263421937 has 2 divisors, whose sum is σ = 263421938. Its totient is φ = 263421936.

The previous prime is 263421889. The next prime is 263421971. The reversal of 263421937 is 739124362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 261016336 + 2405601 = 16156^2 + 1551^2 .

It is a cyclic number.

It is not a de Polignac number, because 263421937 - 2¹¹ = 263419889 is a prime.

It is a super-2 number, since 2×263421937² = 138782233785663938, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 263421896 and 263421905.

It is not a weakly prime, because it can be changed into another prime (263421337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131710968 + 131710969.

It is an arithmetic number, because the mean of its divisors is an integer number (131710969).

Almost surely, 2^263421937 is an apocalyptic number.

It is an amenable number.

263421937 is a deficient number, since it is larger than the sum of its proper divisors (1).

263421937 is an equidigital number, since it uses as much as digits as its factorization.

263421937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 37.

The square root of 263421937 is about 16230.2784018020. The cubic root of 263421937 is about 641.0383023947.

The spelling of 263421937 in words is "two hundred sixty-three million, four hundred twenty-one thousand, nine hundred thirty-seven".