79908189 has 4 divisors (see below), whose sum is σ = 106544256. Its totient is φ = 53272124.

The previous prime is 79908161. The next prime is 79908229. The reversal of 79908189 is 98180997.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79908189 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 (79908119) 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, 13318029 + ... + 13318034.

It is an arithmetic number, because the mean of its divisors is an integer number (26636064).

Almost surely, 2^79908189 is an apocalyptic number.

It is an amenable number.

79908189 is a deficient number, since it is larger than the sum of its proper divisors (26636067).

79908189 is a wasteful number, since it uses less digits than its factorization.

79908189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26636066.

The product of its (nonzero) digits is 326592, while the sum is 51.

The square root of 79908189 is about 8939.1380456955. The cubic root of 79908189 is about 430.7220409068.

The spelling of 79908189 in words is "seventy-nine million, nine hundred eight thousand, one hundred eighty-nine".