68633431 has 2 divisors, whose sum is σ = 68633432. Its totient is φ = 68633430.

The previous prime is 68633429. The next prime is 68633497. The reversal of 68633431 is 13433686.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68633431 - 2¹ = 68633429 is a prime.

It is a super-4 number, since 4×68633431⁴ (a number of 32 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

Together with 68633429, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68663431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34316715 + 34316716.

It is an arithmetic number, because the mean of its divisors is an integer number (34316716).

Almost surely, 2^68633431 is an apocalyptic number.

68633431 is a deficient number, since it is larger than the sum of its proper divisors (1).

68633431 is an equidigital number, since it uses as much as digits as its factorization.

68633431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 34.

The square root of 68633431 is about 8284.5296185118. The cubic root of 68633431 is about 409.4289710790.

It can be divided in two parts, 6863 and 3431, that multiplied together give a triangular number (23546953 = T₆₈₆₂).

The spelling of 68633431 in words is "sixty-eight million, six hundred thirty-three thousand, four hundred thirty-one".