68723990 has 16 divisors (see below), whose sum is σ = 123826752. Its totient is φ = 27462144.

The previous prime is 68723989. The next prime is 68724031. The reversal of 68723990 is 9932786.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9347 + ... + 14993.

It is an arithmetic number, because the mean of its divisors is an integer number (7739172).

Almost surely, 2^68723990 is an apocalyptic number.

68723990 is a deficient number, since it is larger than the sum of its proper divisors (55102762).

68723990 is a wasteful number, since it uses less digits than its factorization.

68723990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6871.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 68723990 is about 8289.9933654979. The cubic root of 68723990 is about 409.6089668536.

The spelling of 68723990 in words is "sixty-eight million, seven hundred twenty-three thousand, nine hundred ninety".