79772109 has 8 divisors (see below), whose sum is σ = 112619520. Its totient is φ = 50053056.

The previous prime is 79772107. The next prime is 79772117. The reversal of 79772109 is 90127797.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 79772109 - 2¹ = 79772107 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79772107) 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 7 ways as a sum of consecutive naturals, for example, 782029 + ... + 782130.

It is an arithmetic number, because the mean of its divisors is an integer number (14077440).

Almost surely, 2^79772109 is an apocalyptic number.

It is an amenable number.

79772109 is a deficient number, since it is larger than the sum of its proper divisors (32847411).

79772109 is a wasteful number, since it uses less digits than its factorization.

79772109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564179.

The product of its (nonzero) digits is 55566, while the sum is 42.

The square root of 79772109 is about 8931.5233303172. The cubic root of 79772109 is about 430.4774019900.

The spelling of 79772109 in words is "seventy-nine million, seven hundred seventy-two thousand, one hundred nine".