263928631 has 2 divisors, whose sum is σ = 263928632. Its totient is φ = 263928630.

The previous prime is 263928593. The next prime is 263928649. The reversal of 263928631 is 136829362.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 263928631 - 2⁷ = 263928503 is a prime.

It is a super-2 number, since 2×263928631² = 139316644523068322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263928671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131964315 + 131964316.

It is an arithmetic number, because the mean of its divisors is an integer number (131964316).

Almost surely, 2^263928631 is an apocalyptic number.

263928631 is a deficient number, since it is larger than the sum of its proper divisors (1).

263928631 is an equidigital number, since it uses as much as digits as its factorization.

263928631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 40.

The square root of 263928631 is about 16245.8804316664. The cubic root of 263928631 is about 641.4490530827.

The spelling of 263928631 in words is "two hundred sixty-three million, nine hundred twenty-eight thousand, six hundred thirty-one".