79161571 has 4 divisors (see below), whose sum is σ = 83818152. Its totient is φ = 74504992.

The previous prime is 79161559. The next prime is 79161587. The reversal of 79161571 is 17516197.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17516197 = 71 ⋅246707.

It is a cyclic number.

It is not a de Polignac number, because 79161571 - 2⁷ = 79161443 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 79161571.

It is not an unprimeable number, because it can be changed into a prime (79161671) 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, 2328265 + ... + 2328298.

It is an arithmetic number, because the mean of its divisors is an integer number (20954538).

Almost surely, 2^79161571 is an apocalyptic number.

79161571 is a deficient number, since it is larger than the sum of its proper divisors (4656581).

79161571 is a wasteful number, since it uses less digits than its factorization.

79161571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4656580.

The product of its digits is 13230, while the sum is 37.

The square root of 79161571 is about 8897.2788536721. The cubic root of 79161571 is about 429.3763647640.

The spelling of 79161571 in words is "seventy-nine million, one hundred sixty-one thousand, five hundred seventy-one".