263685131 has 2 divisors, whose sum is σ = 263685132. Its totient is φ = 263685130.

The previous prime is 263685119. The next prime is 263685187. The reversal of 263685131 is 131586362.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 263685131 - 2⁶ = 263685067 is a prime.

It is a super-2 number, since 2×263685131² = 139059696620974322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 263685091 and 263685100.

It is not a weakly prime, because it can be changed into another prime (263685431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131842565 + 131842566.

It is an arithmetic number, because the mean of its divisors is an integer number (131842566).

Almost surely, 2^263685131 is an apocalyptic number.

263685131 is a deficient number, since it is larger than the sum of its proper divisors (1).

263685131 is an equidigital number, since it uses as much as digits as its factorization.

263685131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 35.

The square root of 263685131 is about 16238.3844947704. The cubic root of 263685131 is about 641.2517258699.

The spelling of 263685131 in words is "two hundred sixty-three million, six hundred eighty-five thousand, one hundred thirty-one".