68426687 has 12 divisors (see below), whose sum is σ = 79907616. Its totient is φ = 58423680.

The previous prime is 68426681. The next prime is 68426693. The reversal of 68426687 is 78662486.

It is an interprime number because it is at equal distance from previous prime (68426681) and next prime (68426693).

It is not a de Polignac number, because 68426687 - 2¹⁶ = 68361151 is a prime.

It is a super-2 number, since 2×68426687² = 9364422987591938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68426681) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10703 + ... + 15855.

It is an arithmetic number, because the mean of its divisors is an integer number (6658968).

Almost surely, 2^68426687 is an apocalyptic number.

68426687 is a deficient number, since it is larger than the sum of its proper divisors (11480929).

68426687 is a wasteful number, since it uses less digits than its factorization.

68426687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5438 (or 5431 counting only the distinct ones).

The product of its digits is 774144, while the sum is 47.

The square root of 68426687 is about 8272.0424926375. The cubic root of 68426687 is about 409.0174509285.

The spelling of 68426687 in words is "sixty-eight million, four hundred twenty-six thousand, six hundred eighty-seven".