648796931 has 2 divisors, whose sum is σ = 648796932. Its totient is φ = 648796930.

The previous prime is 648796927. The next prime is 648796957. The reversal of 648796931 is 139697846.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 648796931 - 2² = 648796927 is a prime.

It is a super-2 number, since 2×648796931² = 841874915350037522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (648796531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324398465 + 324398466.

It is an arithmetic number, because the mean of its divisors is an integer number (324398466).

Almost surely, 2^648796931 is an apocalyptic number.

648796931 is a deficient number, since it is larger than the sum of its proper divisors (1).

648796931 is an equidigital number, since it uses as much as digits as its factorization.

648796931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 53.

The square root of 648796931 is about 25471.4925161444. The cubic root of 648796931 is about 865.7043417324.

The spelling of 648796931 in words is "six hundred forty-eight million, seven hundred ninety-six thousand, nine hundred thirty-one".