263579123957 has 2 divisors, whose sum is σ = 263579123958. Its totient is φ = 263579123956.

The previous prime is 263579123897. The next prime is 263579123981. The reversal of 263579123957 is 759321975362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210106723876 + 53472400081 = 458374^2 + 231241^2 .

It is a cyclic number.

It is not a de Polignac number, because 263579123957 - 2²⁰ = 263578075381 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 263579123896 and 263579123905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263579122957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131789561978 + 131789561979.

It is an arithmetic number, because the mean of its divisors is an integer number (131789561979).

Almost surely, 2^263579123957 is an apocalyptic number.

It is an amenable number.

263579123957 is a deficient number, since it is larger than the sum of its proper divisors (1).

263579123957 is an equidigital number, since it uses as much as digits as its factorization.

263579123957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21432600, while the sum is 59.

The spelling of 263579123957 in words is "two hundred sixty-three billion, five hundred seventy-nine million, one hundred twenty-three thousand, nine hundred fifty-seven".