79798489 has 3 divisors (see below), whose sum is σ = 79807423. Its totient is φ = 79789556.

The previous prime is 79798483. The next prime is 79798507. The reversal of 79798489 is 98489797.

The square root of 79798489 is 8933.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 20385225 + 59413264 = 4515^2 + 7708^2 .

It is not a de Polignac number, because 79798489 - 2⁵ = 79798457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79798483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4467 + ... + 13399.

Almost surely, 2^79798489 is an apocalyptic number.

79798489 is the 8933-rd square number.

79798489 is the 4467-th centered octagonal number.

It is an amenable number.

79798489 is a deficient number, since it is larger than the sum of its proper divisors (8934).

79798489 is an frugal number, since it uses more digits than its factorization.

79798489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17866 (or 8933 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 61.

The cubic root of 79798489 is about 430.5248485745.

Multiplying 79798489 by its product of digits (9144576), we get a square (729723347345664 = 27013392²).

The spelling of 79798489 in words is "seventy-nine million, seven hundred ninety-eight thousand, four hundred eighty-nine".