312249393 has 12 divisors (see below), whose sum is σ = 452500048. Its totient is φ = 207486360.

The previous prime is 312249389. The next prime is 312249407. The reversal of 312249393 is 393942213.

It is not a de Polignac number, because 312249393 - 2² = 312249389 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312249313) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53743 + ... + 59268.

Almost surely, 2^312249393 is an apocalyptic number.

It is an amenable number.

312249393 is a deficient number, since it is larger than the sum of its proper divisors (140250655).

312249393 is a wasteful number, since it uses less digits than its factorization.

312249393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113324 (or 113321 counting only the distinct ones).

The product of its digits is 34992, while the sum is 36.

The square root of 312249393 is about 17670.5798716398. The cubic root of 312249393 is about 678.4229550880.

The spelling of 312249393 in words is "three hundred twelve million, two hundred forty-nine thousand, three hundred ninety-three".