312743693 has 2 divisors, whose sum is σ = 312743694. Its totient is φ = 312743692.

The previous prime is 312743677. The next prime is 312743701. The reversal of 312743693 is 396347213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 311946244 + 797449 = 17662^2 + 893^2 .

It is a cyclic number.

It is not a de Polignac number, because 312743693 - 2⁴ = 312743677 is a prime.

It is a super-2 number, since 2×312743693² = 195617235022556498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312743633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156371846 + 156371847.

It is an arithmetic number, because the mean of its divisors is an integer number (156371847).

Almost surely, 2^312743693 is an apocalyptic number.

It is an amenable number.

312743693 is a deficient number, since it is larger than the sum of its proper divisors (1).

312743693 is an equidigital number, since it uses as much as digits as its factorization.

312743693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 38.

The square root of 312743693 is about 17684.5608653424. The cubic root of 312743693 is about 678.7807542023.

The spelling of 312743693 in words is "three hundred twelve million, seven hundred forty-three thousand, six hundred ninety-three".