79699189 has 4 divisors (see below), whose sum is σ = 79950924. Its totient is φ = 79447456.

The previous prime is 79699181. The next prime is 79699219. The reversal of 79699189 is 98199697.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98199697 = 9743 ⋅10079.

It can be written as a sum of positive squares in 2 ways, for example, as 28462225 + 51236964 = 5335^2 + 7158^2 .

It is a cyclic number.

It is not a de Polignac number, because 79699189 - 2³ = 79699181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79699181) 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, 125392 + ... + 126025.

It is an arithmetic number, because the mean of its divisors is an integer number (19987731).

Almost surely, 2^79699189 is an apocalyptic number.

It is an amenable number.

79699189 is a deficient number, since it is larger than the sum of its proper divisors (251735).

79699189 is a wasteful number, since it uses less digits than its factorization.

79699189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251734.

The product of its digits is 2204496, while the sum is 58.

The square root of 79699189 is about 8927.4402266271. The cubic root of 79699189 is about 430.3461949716.

The spelling of 79699189 in words is "seventy-nine million, six hundred ninety-nine thousand, one hundred eighty-nine".