80632779 has 16 divisors (see below), whose sum is σ = 112492800. Its totient is φ = 51276896.

The previous prime is 80632771. The next prime is 80632781. The reversal of 80632779 is 97723608.

It is a cyclic number.

It is not a de Polignac number, because 80632779 - 2³ = 80632771 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80632779.

It is not an unprimeable number, because it can be changed into a prime (80632771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27517 + ... + 30305.

It is an arithmetic number, because the mean of its divisors is an integer number (7030800).

Almost surely, 2^80632779 is an apocalyptic number.

80632779 is a deficient number, since it is larger than the sum of its proper divisors (31860021).

80632779 is a wasteful number, since it uses less digits than its factorization.

80632779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3234.

The product of its (nonzero) digits is 127008, while the sum is 42.

The square root of 80632779 is about 8979.5756581255. The cubic root of 80632779 is about 432.0200232917.

The spelling of 80632779 in words is "eighty million, six hundred thirty-two thousand, seven hundred seventy-nine".