312633397 has 2 divisors, whose sum is σ = 312633398. Its totient is φ = 312633396.

The previous prime is 312633359. The next prime is 312633403. The reversal of 312633397 is 793336213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 278422596 + 34210801 = 16686^2 + 5849^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312633397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312633197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156316698 + 156316699.

It is an arithmetic number, because the mean of its divisors is an integer number (156316699).

Almost surely, 2^312633397 is an apocalyptic number.

It is an amenable number.

312633397 is a deficient number, since it is larger than the sum of its proper divisors (1).

312633397 is an equidigital number, since it uses as much as digits as its factorization.

312633397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61236, while the sum is 37.

The square root of 312633397 is about 17681.4421640318. The cubic root of 312633397 is about 678.7009491238.

The spelling of 312633397 in words is "three hundred twelve million, six hundred thirty-three thousand, three hundred ninety-seven".