312345493 has 2 divisors, whose sum is σ = 312345494. Its totient is φ = 312345492.

The previous prime is 312345487. The next prime is 312345511. The reversal of 312345493 is 394543213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 218507524 + 93837969 = 14782^2 + 9687^2 .

It is a cyclic number.

It is not a de Polignac number, because 312345493 - 2⁵ = 312345461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312345413) 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 as a sum of consecutive naturals, namely, 156172746 + 156172747.

It is an arithmetic number, because the mean of its divisors is an integer number (156172747).

Almost surely, 2^312345493 is an apocalyptic number.

It is an amenable number.

312345493 is a deficient number, since it is larger than the sum of its proper divisors (1).

312345493 is an equidigital number, since it uses as much as digits as its factorization.

312345493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 34.

The square root of 312345493 is about 17673.2988714614. The cubic root of 312345493 is about 678.4925466390.

The spelling of 312345493 in words is "three hundred twelve million, three hundred forty-five thousand, four hundred ninety-three".