263389967 has 2 divisors, whose sum is σ = 263389968. Its totient is φ = 263389966.

The previous prime is 263389963. The next prime is 263390063. The reversal of 263389967 is 769983362.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 263389967 - 2² = 263389963 is a prime.

It is a super-2 number, since 2×263389967² = 138748549432522178, 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 (263389961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131694983 + 131694984.

It is an arithmetic number, because the mean of its divisors is an integer number (131694984).

Almost surely, 2^263389967 is an apocalyptic number.

263389967 is a deficient number, since it is larger than the sum of its proper divisors (1).

263389967 is an equidigital number, since it uses as much as digits as its factorization.

263389967 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2939328, while the sum is 53.

The square root of 263389967 is about 16229.2934843141. The cubic root of 263389967 is about 641.0123683060.

The spelling of 263389967 in words is "two hundred sixty-three million, three hundred eighty-nine thousand, nine hundred sixty-seven".