68197977 has 8 divisors (see below), whose sum is σ = 101034080. Its totient is φ = 45465300.

The previous prime is 68197951. The next prime is 68197981. The reversal of 68197977 is 77979186.

It is not a de Polignac number, because 68197977 - 2⁸ = 68197721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68197907) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1262899 + ... + 1262952.

It is an arithmetic number, because the mean of its divisors is an integer number (12629260).

Almost surely, 2^68197977 is an apocalyptic number.

It is an amenable number.

68197977 is a deficient number, since it is larger than the sum of its proper divisors (32836103).

68197977 is a wasteful number, since it uses less digits than its factorization.

68197977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2525860 (or 2525854 counting only the distinct ones).

The product of its digits is 1333584, while the sum is 54.

The square root of 68197977 is about 8258.2066455133. The cubic root of 68197977 is about 408.5612410164.

The spelling of 68197977 in words is "sixty-eight million, one hundred ninety-seven thousand, nine hundred seventy-seven".