68656971 has 8 divisors (see below), whose sum is σ = 94495744. Its totient is φ = 44294760.

The previous prime is 68656957. The next prime is 68656993. The reversal of 68656971 is 17965686.

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

It is a de Polignac number, because none of the positive numbers 2^k-68656971 is a prime.

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 68656971.

It is not an unprimeable number, because it can be changed into a prime (68651971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 369031 + ... + 369216.

It is an arithmetic number, because the mean of its divisors is an integer number (11811968).

Almost surely, 2^68656971 is an apocalyptic number.

68656971 is a deficient number, since it is larger than the sum of its proper divisors (25838773).

68656971 is a wasteful number, since it uses less digits than its factorization.

68656971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738281.

The product of its digits is 544320, while the sum is 48.

The square root of 68656971 is about 8285.9502170843. The cubic root of 68656971 is about 409.4757745885.

The spelling of 68656971 in words is "sixty-eight million, six hundred fifty-six thousand, nine hundred seventy-one".