68432521 has 8 divisors (see below), whose sum is σ = 71495424. Its totient is φ = 65376960.

The previous prime is 68432503. The next prime is 68432549. The reversal of 68432521 is 12523486.

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

It is a cyclic number.

It is not a de Polignac number, because 68432521 - 2¹³ = 68424329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68432921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27105 + ... + 29521.

It is an arithmetic number, because the mean of its divisors is an integer number (8936928).

Almost surely, 2^68432521 is an apocalyptic number.

It is an amenable number.

68432521 is a deficient number, since it is larger than the sum of its proper divisors (3062903).

68432521 is a wasteful number, since it uses less digits than its factorization.

68432521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3671.

The product of its digits is 11520, while the sum is 31.

The square root of 68432521 is about 8272.3951187066. The cubic root of 68432521 is about 409.0290747559.

The spelling of 68432521 in words is "sixty-eight million, four hundred thirty-two thousand, five hundred twenty-one".