312925139 has 4 divisors (see below), whose sum is σ = 312962880. Its totient is φ = 312887400.

The previous prime is 312925133. The next prime is 312925183. The reversal of 312925139 is 931529213.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 931529213 = 29 ⋅32121697.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312925139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312925099 and 312925108.

It is not an unprimeable number, because it can be changed into a prime (312925133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419 + ... + 25020.

It is an arithmetic number, because the mean of its divisors is an integer number (78240720).

Almost surely, 2^312925139 is an apocalyptic number.

312925139 is a deficient number, since it is larger than the sum of its proper divisors (37741).

312925139 is a wasteful number, since it uses less digits than its factorization.

312925139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37740.

The product of its digits is 14580, while the sum is 35.

The square root of 312925139 is about 17689.6901894861. The cubic root of 312925139 is about 678.9119993131.

The spelling of 312925139 in words is "three hundred twelve million, nine hundred twenty-five thousand, one hundred thirty-nine".