68979775 has 12 divisors (see below), whose sum is σ = 85695904. Its totient is φ = 55080000.

The previous prime is 68979767. The next prime is 68979793. The reversal of 68979775 is 57797986.

It is not a de Polignac number, because 68979775 - 2³ = 68979767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12730 + ... + 17320.

Almost surely, 2^68979775 is an apocalyptic number.

68979775 is a deficient number, since it is larger than the sum of its proper divisors (16716129).

68979775 is a wasteful number, since it uses less digits than its factorization.

68979775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5202 (or 5197 counting only the distinct ones).

The product of its digits is 6667920, while the sum is 58.

The square root of 68979775 is about 8305.4063717557. The cubic root of 68979775 is about 410.1165145754.

The spelling of 68979775 in words is "sixty-eight million, nine hundred seventy-nine thousand, seven hundred seventy-five".