312722749 has 4 divisors (see below), whose sum is σ = 312943936. Its totient is φ = 312501564.

The previous prime is 312722731. The next prime is 312722759. The reversal of 312722749 is 947227213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 312722749 - 2¹¹ = 312720701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312722759) 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, 108459 + ... + 111304.

It is an arithmetic number, because the mean of its divisors is an integer number (78235984).

Almost surely, 2^312722749 is an apocalyptic number.

It is an amenable number.

312722749 is a deficient number, since it is larger than the sum of its proper divisors (221187).

312722749 is a wasteful number, since it uses less digits than its factorization.

312722749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221186.

The product of its digits is 42336, while the sum is 37.

The square root of 312722749 is about 17683.9687004925. The cubic root of 312722749 is about 678.7656015370.

The spelling of 312722749 in words is "three hundred twelve million, seven hundred twenty-two thousand, seven hundred forty-nine".