79781153 has 8 divisors (see below), whose sum is σ = 84593160. Its totient is φ = 74982400.

The previous prime is 79781131. The next prime is 79781159. The reversal of 79781153 is 35118797.

It can be written as a sum of positive squares in 4 ways, for example, as 62283664 + 17497489 = 7892^2 + 4183^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 79781153 - 2²⁴ = 63003937 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79781153.

It is not an unprimeable number, because it can be changed into a prime (79781159) 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 7 ways as a sum of consecutive naturals, for example, 10853 + ... + 16653.

It is an arithmetic number, because the mean of its divisors is an integer number (10574145).

Almost surely, 2^79781153 is an apocalyptic number.

It is an amenable number.

79781153 is a deficient number, since it is larger than the sum of its proper divisors (4812007).

79781153 is a wasteful number, since it uses less digits than its factorization.

79781153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6627.

The product of its digits is 52920, while the sum is 41.

The square root of 79781153 is about 8932.0296125797. The cubic root of 79781153 is about 430.4936695408.

The spelling of 79781153 in words is "seventy-nine million, seven hundred eighty-one thousand, one hundred fifty-three".