68790015 has 24 divisors (see below), whose sum is σ = 136270368. Its totient is φ = 31446720.

The previous prime is 68790011. The next prime is 68790019. The reversal of 68790015 is 51009786.

It is an interprime number because it is at equal distance from previous prime (68790011) and next prime (68790019).

It is not a de Polignac number, because 68790015 - 2² = 68790011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68790011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 108876 + ... + 109505.

It is an arithmetic number, because the mean of its divisors is an integer number (5677932).

Almost surely, 2^68790015 is an apocalyptic number.

68790015 is a deficient number, since it is larger than the sum of its proper divisors (67480353).

68790015 is a wasteful number, since it uses less digits than its factorization.

68790015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218399 (or 218396 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 68790015 is about 8293.9746201685. The cubic root of 68790015 is about 409.7400990142.

The spelling of 68790015 in words is "sixty-eight million, seven hundred ninety thousand, fifteen".