67497631 has 2 divisors, whose sum is σ = 67497632. Its totient is φ = 67497630.

The previous prime is 67497629. The next prime is 67497649. The reversal of 67497631 is 13679476.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 67497631 - 2¹ = 67497629 is a prime.

It is a super-2 number, since 2×67497631² = 9111860381224322, which contains 22 as substring.

Together with 67497629, 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 (67497601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33748815 + 33748816.

It is an arithmetic number, because the mean of its divisors is an integer number (33748816).

Almost surely, 2^67497631 is an apocalyptic number.

67497631 is a deficient number, since it is larger than the sum of its proper divisors (1).

67497631 is an equidigital number, since it uses as much as digits as its factorization.

67497631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 43.

The square root of 67497631 is about 8215.6941885637. The cubic root of 67497631 is about 407.1578791333.

The spelling of 67497631 in words is "sixty-seven million, four hundred ninety-seven thousand, six hundred thirty-one".