79157147 has 4 divisors (see below), whose sum is σ = 79218480. Its totient is φ = 79095816.

The previous prime is 79157123. The next prime is 79157231. The reversal of 79157147 is 74175197.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74175197 = 6997 ⋅10601.

It is a cyclic number.

It is not a de Polignac number, because 79157147 - 2¹⁶ = 79091611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79157047) 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, 28688 + ... + 31325.

It is an arithmetic number, because the mean of its divisors is an integer number (19804620).

Almost surely, 2^79157147 is an apocalyptic number.

79157147 is a deficient number, since it is larger than the sum of its proper divisors (61333).

79157147 is a wasteful number, since it uses less digits than its factorization.

79157147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61332.

The product of its digits is 61740, while the sum is 41.

The square root of 79157147 is about 8897.0302348593. The cubic root of 79157147 is about 429.3683659484.

The spelling of 79157147 in words is "seventy-nine million, one hundred fifty-seven thousand, one hundred forty-seven".