68633979 has 8 divisors (see below), whose sum is σ = 91768320. Its totient is φ = 45627816.

The previous prime is 68633953. The next prime is 68634011. The reversal of 68633979 is 97933686.

It is a happy number.

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

It is not a de Polignac number, because 68633979 - 2²⁵ = 35079547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68637979) by changing a digit.

It is a Zeisel number, with parameters (178, -175).

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30787 + ... + 32940.

It is an arithmetic number, because the mean of its divisors is an integer number (11471040).

Almost surely, 2^68633979 is an apocalyptic number.

68633979 is a deficient number, since it is larger than the sum of its proper divisors (23134341).

68633979 is a wasteful number, since it uses less digits than its factorization.

68633979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64089.

The product of its digits is 1469664, while the sum is 51.

The square root of 68633979 is about 8284.5626921401. The cubic root of 68633979 is about 409.4300607641.

The spelling of 68633979 in words is "sixty-eight million, six hundred thirty-three thousand, nine hundred seventy-nine".