68915684 has 6 divisors (see below), whose sum is σ = 120602454. Its totient is φ = 34457840.

The previous prime is 68915669. The next prime is 68915699. The reversal of 68915684 is 48651986.

68915684 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (68915669) and next prime (68915699).

It can be written as a sum of positive squares in only one way, i.e., 66748900 + 2166784 = 8170^2 + 1472^2 .

68915684 is strictly pandigital in base 9.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8614457 + ... + 8614464.

It is an arithmetic number, because the mean of its divisors is an integer number (20100409).

Almost surely, 2^68915684 is an apocalyptic number.

It is an amenable number.

68915684 is a deficient number, since it is larger than the sum of its proper divisors (51686770).

68915684 is a wasteful number, since it uses less digits than its factorization.

68915684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17228925 (or 17228923 counting only the distinct ones).

The product of its digits is 414720, while the sum is 47.

The square root of 68915684 is about 8301.5470847307. The cubic root of 68915684 is about 409.9894583845.

The spelling of 68915684 in words is "sixty-eight million, nine hundred fifteen thousand, six hundred eighty-four".