68121775 has 24 divisors (see below), whose sum is σ = 86529680. Its totient is φ = 53187840.

The previous prime is 68121769. The next prime is 68121803. The reversal of 68121775 is 57712186.

It is not a de Polignac number, because 68121775 - 2²⁵ = 34567343 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 297361 + ... + 297589.

Almost surely, 2^68121775 is an apocalyptic number.

68121775 is a deficient number, since it is larger than the sum of its proper divisors (18407905).

68121775 is a wasteful number, since it uses less digits than its factorization.

68121775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475 (or 470 counting only the distinct ones).

The product of its digits is 23520, while the sum is 37.

The square root of 68121775 is about 8253.5916424306. The cubic root of 68121775 is about 408.4090136925.

The spelling of 68121775 in words is "sixty-eight million, one hundred twenty-one thousand, seven hundred seventy-five".