312140493 has 32 divisors (see below), whose sum is σ = 556313600. Its totient is φ = 168976368.

The previous prime is 312140449. The next prime is 312140501. The reversal of 312140493 is 394041213.

312140493 is a `hidden beast` number, since 31 + 2 + 140 + 493 = 666.

It is not a de Polignac number, because 312140493 - 2⁸ = 312140237 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312140443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39871 + ... + 47052.

It is an arithmetic number, because the mean of its divisors is an integer number (17384800).

Almost surely, 2^312140493 is an apocalyptic number.

It is an amenable number.

312140493 is a deficient number, since it is larger than the sum of its proper divisors (244173107).

312140493 is a wasteful number, since it uses less digits than its factorization.

312140493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86958 (or 86952 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 312140493 is about 17667.4982099900. The cubic root of 312140493 is about 678.3440770587.

The spelling of 312140493 in words is "three hundred twelve million, one hundred forty thousand, four hundred ninety-three".