68973691 has 2 divisors, whose sum is σ = 68973692. Its totient is φ = 68973690.

The previous prime is 68973689. The next prime is 68973701. The reversal of 68973691 is 19637986.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68973691 - 2¹ = 68973689 is a prime.

Together with 68973689, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (68973601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34486845 + 34486846.

It is an arithmetic number, because the mean of its divisors is an integer number (34486846).

Almost surely, 2^68973691 is an apocalyptic number.

68973691 is a deficient number, since it is larger than the sum of its proper divisors (1).

68973691 is an equidigital number, since it uses as much as digits as its factorization.

68973691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 49.

The square root of 68973691 is about 8305.0400962307. The cubic root of 68973691 is about 410.1044568274.

The spelling of 68973691 in words is "sixty-eight million, nine hundred seventy-three thousand, six hundred ninety-one".