68990579 has 6 divisors (see below), whose sum is σ = 80254404. Its totient is φ = 59134740.

The previous prime is 68990567. The next prime is 68990587. The reversal of 68990579 is 97509986.

It is not a de Polignac number, because 68990579 - 2⁴ = 68990563 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 68990579.

It is not an unprimeable number, because it can be changed into a prime (68990549) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 703937 + ... + 704034.

It is an arithmetic number, because the mean of its divisors is an integer number (13375734).

Almost surely, 2^68990579 is an apocalyptic number.

68990579 is a deficient number, since it is larger than the sum of its proper divisors (11263825).

68990579 is a wasteful number, since it uses less digits than its factorization.

68990579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1407985 (or 1407978 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 53.

The square root of 68990579 is about 8306.0567659991. The cubic root of 68990579 is about 410.1379250420.

The spelling of 68990579 in words is "sixty-eight million, nine hundred ninety thousand, five hundred seventy-nine".