68313539 has 4 divisors (see below), whose sum is σ = 78072624. Its totient is φ = 58554456.

The previous prime is 68313529. The next prime is 68313551. The reversal of 68313539 is 93531386.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68313539 is a prime.

It is a super-2 number, since 2×68313539² = 9333479221409042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68313529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4879532 + ... + 4879545.

It is an arithmetic number, because the mean of its divisors is an integer number (19518156).

Almost surely, 2^68313539 is an apocalyptic number.

68313539 is a deficient number, since it is larger than the sum of its proper divisors (9759085).

68313539 is an equidigital number, since it uses as much as digits as its factorization.

68313539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9759084.

The product of its digits is 58320, while the sum is 38.

The square root of 68313539 is about 8265.2004815370. The cubic root of 68313539 is about 408.7918808537.

The spelling of 68313539 in words is "sixty-eight million, three hundred thirteen thousand, five hundred thirty-nine".