68836431 has 4 divisors (see below), whose sum is σ = 91781912. Its totient is φ = 45890952.

The previous prime is 68836409. The next prime is 68836433. The reversal of 68836431 is 13463886.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 68836431 - 2⁹ = 68835919 is a prime.

It is a super-2 number, since 2×68836431² = 9476908465635522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68836431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68836433) by changing a digit.

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, 11472736 + ... + 11472741.

It is an arithmetic number, because the mean of its divisors is an integer number (22945478).

Almost surely, 2^68836431 is an apocalyptic number.

68836431 is a deficient number, since it is larger than the sum of its proper divisors (22945481).

68836431 is a wasteful number, since it uses less digits than its factorization.

68836431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22945480.

The product of its digits is 82944, while the sum is 39.

The square root of 68836431 is about 8296.7723242234. The cubic root of 68836431 is about 409.8322355473.

The spelling of 68836431 in words is "sixty-eight million, eight hundred thirty-six thousand, four hundred thirty-one".