313216091 has 2 divisors, whose sum is σ = 313216092. Its totient is φ = 313216090.

The previous prime is 313216051. The next prime is 313216117. The reversal of 313216091 is 190612313.

It is an a-pointer prime, because the next prime (313216117) can be obtained adding 313216091 to its sum of digits (26).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 313216091 - 2⁶ = 313216027 is a prime.

It is a super-2 number, since 2×313216091² = 196208639322640562, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 313216091.

It is not a weakly prime, because it can be changed into another prime (313216051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156608045 + 156608046.

It is an arithmetic number, because the mean of its divisors is an integer number (156608046).

Almost surely, 2^313216091 is an apocalyptic number.

313216091 is a deficient number, since it is larger than the sum of its proper divisors (1).

313216091 is an equidigital number, since it uses as much as digits as its factorization.

313216091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 313216091 is about 17697.9120519908. The cubic root of 313216091 is about 679.1223474026.

The spelling of 313216091 in words is "three hundred thirteen million, two hundred sixteen thousand, ninety-one".