312144649 has 2 divisors, whose sum is σ = 312144650. Its totient is φ = 312144648.

The previous prime is 312144643. The next prime is 312144659. The reversal of 312144649 is 946441213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 286692624 + 25452025 = 16932^2 + 5045^2 .

It is a cyclic number.

It is not a de Polignac number, because 312144649 - 2¹¹ = 312142601 is a prime.

It is a nialpdrome in base 12.

It is not a weakly prime, because it can be changed into another prime (312144643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156072324 + 156072325.

It is an arithmetic number, because the mean of its divisors is an integer number (156072325).

Almost surely, 2^312144649 is an apocalyptic number.

It is an amenable number.

312144649 is a deficient number, since it is larger than the sum of its proper divisors (1).

312144649 is an equidigital number, since it uses as much as digits as its factorization.

312144649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 34.

The square root of 312144649 is about 17667.6158267040. The cubic root of 312144649 is about 678.3470876534.

The spelling of 312144649 in words is "three hundred twelve million, one hundred forty-four thousand, six hundred forty-nine".