68979975 has 24 divisors (see below), whose sum is σ = 120051840. Its totient is φ = 34852320.

The previous prime is 68979961. The next prime is 68980007. The reversal of 68979975 is 57997986.

It is not a de Polignac number, because 68979975 - 2⁵ = 68979943 is a prime.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 22779 + ... + 25628.

It is an arithmetic number, because the mean of its divisors is an integer number (5002160).

Almost surely, 2^68979975 is an apocalyptic number.

68979975 is a deficient number, since it is larger than the sum of its proper divisors (51071865).

68979975 is a wasteful number, since it uses less digits than its factorization.

68979975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48439 (or 48434 counting only the distinct ones).

The product of its digits is 8573040, while the sum is 60.

The square root of 68979975 is about 8305.4184120970. The cubic root of 68979975 is about 410.1169109390.

The spelling of 68979975 in words is "sixty-eight million, nine hundred seventy-nine thousand, nine hundred seventy-five".