79638567 has 4 divisors (see below), whose sum is σ = 106184760. Its totient is φ = 53092376.

The previous prime is 79638529. The next prime is 79638569. The reversal of 79638567 is 76583697.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76583697 = 3 ⋅25527899.

It is a cyclic number.

It is not a de Polignac number, because 79638567 - 2¹¹ = 79636519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79638569) 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, 13273092 + ... + 13273097.

It is an arithmetic number, because the mean of its divisors is an integer number (26546190).

Almost surely, 2^79638567 is an apocalyptic number.

79638567 is a deficient number, since it is larger than the sum of its proper divisors (26546193).

79638567 is a wasteful number, since it uses less digits than its factorization.

79638567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26546192.

The product of its digits is 1905120, while the sum is 51.

The square root of 79638567 is about 8924.0443185811. The cubic root of 79638567 is about 430.2370551558.

The spelling of 79638567 in words is "seventy-nine million, six hundred thirty-eight thousand, five hundred sixty-seven".