68636894 has 8 divisors (see below), whose sum is σ = 103094688. Its totient is φ = 34272000.

The previous prime is 68636879. The next prime is 68636917. The reversal of 68636894 is 49863686.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×68636894² = 9422046435934472, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 21347 + ... + 24350.

It is an arithmetic number, because the mean of its divisors is an integer number (12886836).

Almost surely, 2^68636894 is an apocalyptic number.

68636894 is a deficient number, since it is larger than the sum of its proper divisors (34457794).

68636894 is a wasteful number, since it uses less digits than its factorization.

68636894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46450.

The product of its digits is 1492992, while the sum is 50.

The square root of 68636894 is about 8284.7386198962. The cubic root of 68636894 is about 409.4358570754.

The spelling of 68636894 in words is "sixty-eight million, six hundred thirty-six thousand, eight hundred ninety-four".