312734549 has 2 divisors, whose sum is σ = 312734550. Its totient is φ = 312734548.

The previous prime is 312734501. The next prime is 312734551. The reversal of 312734549 is 945437213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 228553924 + 84180625 = 15118^2 + 9175^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312734549 is a prime.

Together with 312734551, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312734449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156367274 + 156367275.

It is an arithmetic number, because the mean of its divisors is an integer number (156367275).

Almost surely, 2^312734549 is an apocalyptic number.

It is an amenable number.

312734549 is a deficient number, since it is larger than the sum of its proper divisors (1).

312734549 is an equidigital number, since it uses as much as digits as its factorization.

312734549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 38.

The square root of 312734549 is about 17684.3023328601. The cubic root of 312734549 is about 678.7741387407.

The spelling of 312734549 in words is "three hundred twelve million, seven hundred thirty-four thousand, five hundred forty-nine".