68989975 has 6 divisors (see below), whose sum is σ = 85547600. Its totient is φ = 55191960.

The previous prime is 68989957. The next prime is 68989981. The reversal of 68989975 is 57998986.

It is not a de Polignac number, because 68989975 - 2²³ = 60601367 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1379775 + ... + 1379824.

Almost surely, 2^68989975 is an apocalyptic number.

68989975 is a deficient number, since it is larger than the sum of its proper divisors (16557625).

68989975 is a wasteful number, since it uses less digits than its factorization.

68989975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2759609 (or 2759604 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 61.

The square root of 68989975 is about 8306.0204069097. The cubic root of 68989975 is about 410.1367281442.

The spelling of 68989975 in words is "sixty-eight million, nine hundred eighty-nine thousand, nine hundred seventy-five".