312489457 has 16 divisors (see below), whose sum is σ = 367599232. Its totient is φ = 260029440.

The previous prime is 312489451. The next prime is 312489479. The reversal of 312489457 is 754984213.

It is a cyclic number.

It is not a de Polignac number, because 312489457 - 2¹⁵ = 312456689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (312489451) 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 15 ways as a sum of consecutive naturals, for example, 146833 + ... + 148945.

It is an arithmetic number, because the mean of its divisors is an integer number (22974952).

Almost surely, 2^312489457 is an apocalyptic number.

312489457 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

312489457 is a deficient number, since it is larger than the sum of its proper divisors (55109775).

312489457 is a wasteful number, since it uses less digits than its factorization.

312489457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2728.

The product of its digits is 241920, while the sum is 43.

The square root of 312489457 is about 17677.3713260767. The cubic root of 312489457 is about 678.5967725683.

The spelling of 312489457 in words is "three hundred twelve million, four hundred eighty-nine thousand, four hundred fifty-seven".