313240637 has 2 divisors, whose sum is σ = 313240638. Its totient is φ = 313240636.

The previous prime is 313240619. The next prime is 313240639. The reversal of 313240637 is 736042313.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 271392676 + 41847961 = 16474^2 + 6469^2 .

It is a cyclic number.

It is not a de Polignac number, because 313240637 - 2¹⁰ = 313239613 is a prime.

Together with 313240639, 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 (313240639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156620318 + 156620319.

It is an arithmetic number, because the mean of its divisors is an integer number (156620319).

Almost surely, 2^313240637 is an apocalyptic number.

It is an amenable number.

313240637 is a deficient number, since it is larger than the sum of its proper divisors (1).

313240637 is an equidigital number, since it uses as much as digits as its factorization.

313240637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 29.

The square root of 313240637 is about 17698.6055100395. The cubic root of 313240637 is about 679.1400873402.

The spelling of 313240637 in words is "three hundred thirteen million, two hundred forty thousand, six hundred thirty-seven".