68687823 has 16 divisors (see below), whose sum is σ = 93040640. Its totient is φ = 45069696.

The previous prime is 68687819. The next prime is 68687887. The reversal of 68687823 is 32878686.

It is a happy number.

It is not a de Polignac number, because 68687823 - 2² = 68687819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68687023) 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 15 ways as a sum of consecutive naturals, for example, 52311 + ... + 53607.

It is an arithmetic number, because the mean of its divisors is an integer number (5815040).

Almost surely, 2^68687823 is an apocalyptic number.

68687823 is a deficient number, since it is larger than the sum of its proper divisors (24352817).

68687823 is a wasteful number, since it uses less digits than its factorization.

68687823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1566.

The product of its digits is 774144, while the sum is 48.

The square root of 68687823 is about 8287.8117135948. The cubic root of 68687823 is about 409.5371000183.

The spelling of 68687823 in words is "sixty-eight million, six hundred eighty-seven thousand, eight hundred twenty-three".