68539965 has 32 divisors (see below), whose sum is σ = 118626816. Its totient is φ = 33592320.

The previous prime is 68539951. The next prime is 68539969. The reversal of 68539965 is 56993586.

It is not a de Polignac number, because 68539965 - 2⁴ = 68539949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68539969) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52197 + ... + 53493.

It is an arithmetic number, because the mean of its divisors is an integer number (3707088).

Almost surely, 2^68539965 is an apocalyptic number.

68539965 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

68539965 is a deficient number, since it is larger than the sum of its proper divisors (50086851).

68539965 is a wasteful number, since it uses less digits than its factorization.

68539965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589.

The product of its digits is 1749600, while the sum is 51.

The square root of 68539965 is about 8278.8867005172. The cubic root of 68539965 is about 409.2430312148.

The spelling of 68539965 in words is "sixty-eight million, five hundred thirty-nine thousand, nine hundred sixty-five".