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312774137 = 1324059549
BaseRepresentation
bin10010101001001…
…000110111111001
3210210112120110022
4102221020313321
51120032233022
651011500225
710515351644
oct2251106771
9723476408
10312774137
11150609925
12888b7675
134ca51270
142d77aa5b
151c6d3c42
hex12a48df9

312774137 has 4 divisors (see below), whose sum is σ = 336833700. Its totient is φ = 288714576.

The previous prime is 312774127. The next prime is 312774167. The reversal of 312774137 is 731477213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 731477213 = 1193613141.

It can be written as a sum of positive squares in 2 ways, for example, as 187580416 + 125193721 = 13696^2 + 11189^2 .

It is a cyclic number.

It is not a de Polignac number, because 312774137 - 218 = 312511993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312774097 and 312774106.

It is not an unprimeable number, because it can be changed into a prime (312774127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12029762 + ... + 12029787.

It is an arithmetic number, because the mean of its divisors is an integer number (84208425).

Almost surely, 2312774137 is an apocalyptic number.

It is an amenable number.

312774137 is a deficient number, since it is larger than the sum of its proper divisors (24059563).

312774137 is a wasteful number, since it uses less digits than its factorization.

312774137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24059562.

The product of its digits is 24696, while the sum is 35.

The square root of 312774137 is about 17685.4215952009. The cubic root of 312774137 is about 678.8027787667.

The spelling of 312774137 in words is "three hundred twelve million, seven hundred seventy-four thousand, one hundred thirty-seven".

Divisors: 1 13 24059549 312774137