68984779 has 4 divisors (see below), whose sum is σ = 69090120. Its totient is φ = 68879440.

The previous prime is 68984723. The next prime is 68984789. The reversal of 68984779 is 97748986.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68984779 - 2²³ = 60596171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68984789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51682 + ... + 52999.

It is an arithmetic number, because the mean of its divisors is an integer number (17272530).

Almost surely, 2^68984779 is an apocalyptic number.

68984779 is a deficient number, since it is larger than the sum of its proper divisors (105341).

68984779 is a wasteful number, since it uses less digits than its factorization.

68984779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105340.

The product of its digits is 6096384, while the sum is 58.

The square root of 68984779 is about 8305.7076158507. The cubic root of 68984779 is about 410.1264313634.

The spelling of 68984779 in words is "sixty-eight million, nine hundred eighty-four thousand, seven hundred seventy-nine".