313421968949 has 2 divisors, whose sum is σ = 313421968950. Its totient is φ = 313421968948.

The previous prime is 313421968933. The next prime is 313421968963. The reversal of 313421968949 is 949869124313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 286848078724 + 26573890225 = 535582^2 + 163015^2 .

It is a cyclic number.

It is not a de Polignac number, because 313421968949 - 2⁴ = 313421968933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313421968969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156710984474 + 156710984475.

It is an arithmetic number, because the mean of its divisors is an integer number (156710984475).

Almost surely, 2^313421968949 is an apocalyptic number.

It is an amenable number.

313421968949 is a deficient number, since it is larger than the sum of its proper divisors (1).

313421968949 is an equidigital number, since it uses as much as digits as its factorization.

313421968949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10077696, while the sum is 59.

The spelling of 313421968949 in words is "three hundred thirteen billion, four hundred twenty-one million, nine hundred sixty-eight thousand, nine hundred forty-nine".