68432539 has 8 divisors (see below), whose sum is σ = 78386400. Its totient is φ = 58523136.

The previous prime is 68432503. The next prime is 68432549. The reversal of 68432539 is 93523486.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68432539 - 2⁷ = 68432411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68432549) 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, 7744 + ... + 14029.

It is an arithmetic number, because the mean of its divisors is an integer number (9798300).

Almost surely, 2^68432539 is an apocalyptic number.

68432539 is a deficient number, since it is larger than the sum of its proper divisors (9953861).

68432539 is a wasteful number, since it uses less digits than its factorization.

68432539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22229.

The product of its digits is 155520, while the sum is 40.

The square root of 68432539 is about 8272.3962066623. The cubic root of 68432539 is about 409.0291106186.

The spelling of 68432539 in words is "sixty-eight million, four hundred thirty-two thousand, five hundred thirty-nine".