68539329 has 6 divisors (see below), whose sum is σ = 99001266. Its totient is φ = 45692880.

The previous prime is 68539277. The next prime is 68539337. The reversal of 68539329 is 92393586.

It can be written as a sum of positive squares in only one way, i.e., 67617729 + 921600 = 8223^2 + 960^2 .

It is not a de Polignac number, because 68539329 - 2⁷ = 68539201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68539349) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3807732 + ... + 3807749.

It is an arithmetic number, because the mean of its divisors is an integer number (16500211).

Almost surely, 2^68539329 is an apocalyptic number.

It is an amenable number.

68539329 is a deficient number, since it is larger than the sum of its proper divisors (30461937).

68539329 is a wasteful number, since it uses less digits than its factorization.

68539329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7615487 (or 7615484 counting only the distinct ones).

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

The square root of 68539329 is about 8278.8482894664. The cubic root of 68539329 is about 409.2417653870.

The spelling of 68539329 in words is "sixty-eight million, five hundred thirty-nine thousand, three hundred twenty-nine".