68737631 has 2 divisors, whose sum is σ = 68737632. Its totient is φ = 68737630.

The previous prime is 68737621. The next prime is 68737657. The reversal of 68737631 is 13673786.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68737631 - 2⁶ = 68737567 is a prime.

It is a super-2 number, since 2×68737631² = 9449723830984322, 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 (68737621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34368815 + 34368816.

It is an arithmetic number, because the mean of its divisors is an integer number (34368816).

Almost surely, 2^68737631 is an apocalyptic number.

68737631 is a deficient number, since it is larger than the sum of its proper divisors (1).

68737631 is an equidigital number, since it uses as much as digits as its factorization.

68737631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 41.

The square root of 68737631 is about 8290.8160635730. The cubic root of 68737631 is about 409.6360661061.

The spelling of 68737631 in words is "sixty-eight million, seven hundred thirty-seven thousand, six hundred thirty-one".