68790915 has 12 divisors (see below), whose sum is σ = 119237664. Its totient is φ = 36688464.

The previous prime is 68790901. The next prime is 68790923. The reversal of 68790915 is 51909786.

It is not a de Polignac number, because 68790915 - 2⁴ = 68790899 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1528687 = 68790915 / (6 + 8 + 7 + 9 + 0 + 9 + 1 + 5).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 764299 + ... + 764388.

It is an arithmetic number, because the mean of its divisors is an integer number (9936472).

Almost surely, 2^68790915 is an apocalyptic number.

68790915 is a deficient number, since it is larger than the sum of its proper divisors (50446749).

68790915 is a wasteful number, since it uses less digits than its factorization.

68790915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528698 (or 1528695 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 68790915 is about 8294.0288762459. The cubic root of 68790915 is about 409.7418859232.

The spelling of 68790915 in words is "sixty-eight million, seven hundred ninety thousand, nine hundred fifteen".