312698621 has 2 divisors, whose sum is σ = 312698622. Its totient is φ = 312698620.

The previous prime is 312698611. The next prime is 312698641. The reversal of 312698621 is 126896213.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 299774596 + 12924025 = 17314^2 + 3595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312698621 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312698611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156349310 + 156349311.

It is an arithmetic number, because the mean of its divisors is an integer number (156349311).

Almost surely, 2^312698621 is an apocalyptic number.

It is an amenable number.

312698621 is a deficient number, since it is larger than the sum of its proper divisors (1).

312698621 is an equidigital number, since it uses as much as digits as its factorization.

312698621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 38.

The square root of 312698621 is about 17683.2864875283. The cubic root of 312698621 is about 678.7481444576.

The spelling of 312698621 in words is "three hundred twelve million, six hundred ninety-eight thousand, six hundred twenty-one".