312745807 has 4 divisors (see below), whose sum is σ = 341177256. Its totient is φ = 284314360.

The previous prime is 312745781. The next prime is 312745817. The reversal of 312745807 is 708547213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 708547213 = 11 ⋅64413383.

It is not a de Polignac number, because 312745807 - 2⁷ = 312745679 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 (312745817) 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, 14215708 + ... + 14215729.

It is an arithmetic number, because the mean of its divisors is an integer number (85294314).

Almost surely, 2^312745807 is an apocalyptic number.

312745807 is a deficient number, since it is larger than the sum of its proper divisors (28431449).

312745807 is a wasteful number, since it uses less digits than its factorization.

312745807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28431448.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 312745807 is about 17684.6206348906. The cubic root of 312745807 is about 678.7822836115.

The spelling of 312745807 in words is "three hundred twelve million, seven hundred forty-five thousand, eight hundred seven".