79149147 has 64 divisors (see below), whose sum is σ = 137991168. Its totient is φ = 39168000.

The previous prime is 79149139. The next prime is 79149173. The reversal of 79149147 is 74194197.

It is not a de Polignac number, because 79149147 - 2³ = 79149139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79149099 and 79149108.

It is not an unprimeable number, because it can be changed into a prime (79149047) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 577663 + ... + 577799.

It is an arithmetic number, because the mean of its divisors is an integer number (2156112).

Almost surely, 2^79149147 is an apocalyptic number.

79149147 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

79149147 is a deficient number, since it is larger than the sum of its proper divisors (58842021).

79149147 is a wasteful number, since it uses less digits than its factorization.

79149147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260.

The product of its digits is 63504, while the sum is 42.

The square root of 79149147 is about 8896.5806352778. The cubic root of 79149147 is about 429.3539007873.

The spelling of 79149147 in words is "seventy-nine million, one hundred forty-nine thousand, one hundred forty-seven".