245676631997 has 2 divisors, whose sum is σ = 245676631998. Its totient is φ = 245676631996.

The previous prime is 245676631873. The next prime is 245676632041. The reversal of 245676631997 is 799136676542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 243883871716 + 1792760281 = 493846^2 + 42341^2 .

It is a cyclic number.

It is not a de Polignac number, because 245676631997 - 2³⁰ = 244602890173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245676631397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122838315998 + 122838315999.

It is an arithmetic number, because the mean of its divisors is an integer number (122838315999).

Almost surely, 2^245676631997 is an apocalyptic number.

It is an amenable number.

245676631997 is a deficient number, since it is larger than the sum of its proper divisors (1).

245676631997 is an equidigital number, since it uses as much as digits as its factorization.

245676631997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102876480, while the sum is 65.

The spelling of 245676631997 in words is "two hundred forty-five billion, six hundred seventy-six million, six hundred thirty-one thousand, nine hundred ninety-seven".