68761979 has 8 divisors (see below), whose sum is σ = 80783472. Its totient is φ = 57702240.

The previous prime is 68761967. The next prime is 68762003. The reversal of 68761979 is 97916786.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68761979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68761979.

It is not an unprimeable number, because it can be changed into a prime (68761909) 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, 240284 + ... + 240569.

It is an arithmetic number, because the mean of its divisors is an integer number (10097934).

Almost surely, 2^68761979 is an apocalyptic number.

68761979 is a deficient number, since it is larger than the sum of its proper divisors (12021493).

68761979 is a wasteful number, since it uses less digits than its factorization.

68761979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480877.

The product of its digits is 1143072, while the sum is 53.

The square root of 68761979 is about 8292.2843053045. The cubic root of 68761979 is about 409.6844270083.

The spelling of 68761979 in words is "sixty-eight million, seven hundred sixty-one thousand, nine hundred seventy-nine".