80490979 has 4 divisors (see below), whose sum is σ = 83266560. Its totient is φ = 77715400.

The previous prime is 80490959. The next prime is 80490983. The reversal of 80490979 is 97909408.

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 80490979 - 2¹⁵ = 80458211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80490929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1387747 + ... + 1387804.

It is an arithmetic number, because the mean of its divisors is an integer number (20816640).

Almost surely, 2^80490979 is an apocalyptic number.

80490979 is a deficient number, since it is larger than the sum of its proper divisors (2775581).

80490979 is a wasteful number, since it uses less digits than its factorization.

80490979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2775580.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 80490979 is about 8971.6764877028. The cubic root of 80490979 is about 431.7666259933.

The spelling of 80490979 in words is "eighty million, four hundred ninety thousand, nine hundred seventy-nine".