313072381 has 2 divisors, whose sum is σ = 313072382. Its totient is φ = 313072380.

The previous prime is 313072321. The next prime is 313072387. The reversal of 313072381 is 183270313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 311840281 + 1232100 = 17659^2 + 1110^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313072381 is a prime.

It is a super-2 number, since 2×313072381² = 196028631490018322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313072387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156536190 + 156536191.

It is an arithmetic number, because the mean of its divisors is an integer number (156536191).

Almost surely, 2^313072381 is an apocalyptic number.

It is an amenable number.

313072381 is a deficient number, since it is larger than the sum of its proper divisors (1).

313072381 is an equidigital number, since it uses as much as digits as its factorization.

313072381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 313072381 is about 17693.8515027113. The cubic root of 313072381 is about 679.0184664020.

The spelling of 313072381 in words is "three hundred thirteen million, seventy-two thousand, three hundred eighty-one".