79210989 has 24 divisors (see below), whose sum is σ = 134420832. Its totient is φ = 44313120.

The previous prime is 79210961. The next prime is 79210993. The reversal of 79210989 is 98901297.

It is not a de Polignac number, because 79210989 - 2⁹ = 79210477 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79210949) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29487 + ... + 32060.

It is an arithmetic number, because the mean of its divisors is an integer number (5600868).

Almost surely, 2^79210989 is an apocalyptic number.

It is an amenable number.

79210989 is a deficient number, since it is larger than the sum of its proper divisors (55209843).

79210989 is a wasteful number, since it uses less digits than its factorization.

79210989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61577 (or 61574 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 79210989 is about 8900.0555616243. The cubic root of 79210989 is about 429.4656947551.

It can be divided in two parts, 792 and 10989, that added together give a triangular number (11781 = T₁₅₃).

The spelling of 79210989 in words is "seventy-nine million, two hundred ten thousand, nine hundred eighty-nine".