312904869 has 4 divisors (see below), whose sum is σ = 417206496. Its totient is φ = 208603244.

The previous prime is 312904853. The next prime is 312904871. The reversal of 312904869 is 968409213.

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, and also an emirpimes, since its reverse is a distinct semiprime: 968409213 = 3 ⋅322803071.

It is a cyclic number.

It is not a de Polignac number, because 312904869 - 2⁴ = 312904853 is a prime.

It is a super-2 number, since 2×312904869² = 195818914087814322, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 312904869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312904829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52150809 + ... + 52150814.

It is an arithmetic number, because the mean of its divisors is an integer number (104301624).

Almost surely, 2^312904869 is an apocalyptic number.

It is an amenable number.

312904869 is a deficient number, since it is larger than the sum of its proper divisors (104301627).

312904869 is a wasteful number, since it uses less digits than its factorization.

312904869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104301626.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 312904869 is about 17689.1172476187. The cubic root of 312904869 is about 678.8973399567.

The spelling of 312904869 in words is "three hundred twelve million, nine hundred four thousand, eight hundred sixty-nine".