68392539 has 32 divisors (see below), whose sum is σ = 104867840. Its totient is φ = 44019936.

The previous prime is 68392537. The next prime is 68392543. The reversal of 68392539 is 93529386.

It is not a de Polignac number, because 68392539 - 2¹ = 68392537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68392494 and 68392503.

It is not an unprimeable number, because it can be changed into a prime (68392531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 222624 + ... + 222930.

It is an arithmetic number, because the mean of its divisors is an integer number (3277120).

Almost surely, 2^68392539 is an apocalyptic number.

68392539 is a deficient number, since it is larger than the sum of its proper divisors (36475301).

68392539 is a wasteful number, since it uses less digits than its factorization.

68392539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576 (or 570 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 68392539 is about 8269.9781740945. The cubic root of 68392539 is about 408.9494002280.

The spelling of 68392539 in words is "sixty-eight million, three hundred ninety-two thousand, five hundred thirty-nine".