313209997 has 2 divisors, whose sum is σ = 313209998. Its totient is φ = 313209996.

The previous prime is 313209983. The next prime is 313210031. The reversal of 313209997 is 799902313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 274034916 + 39175081 = 16554^2 + 6259^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313209997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313209917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156604998 + 156604999.

It is an arithmetic number, because the mean of its divisors is an integer number (156604999).

Almost surely, 2^313209997 is an apocalyptic number.

It is an amenable number.

313209997 is a deficient number, since it is larger than the sum of its proper divisors (1).

313209997 is an equidigital number, since it uses as much as digits as its factorization.

313209997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 91854, while the sum is 43.

The square root of 313209997 is about 17697.7398839513. The cubic root of 313209997 is about 679.1179429903.

The spelling of 313209997 in words is "three hundred thirteen million, two hundred nine thousand, nine hundred ninety-seven".