79147147 has 2 divisors, whose sum is σ = 79147148. Its totient is φ = 79147146.

The previous prime is 79147129. The next prime is 79147169. The reversal of 79147147 is 74174197.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79147147 is a prime.

It is not a weakly prime, because it can be changed into another prime (79147127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39573573 + 39573574.

It is an arithmetic number, because the mean of its divisors is an integer number (39573574).

Almost surely, 2^79147147 is an apocalyptic number.

79147147 is a deficient number, since it is larger than the sum of its proper divisors (1).

79147147 is an equidigital number, since it uses as much as digits as its factorization.

79147147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49392, while the sum is 40.

The square root of 79147147 is about 8896.4682318322. The cubic root of 79147147 is about 429.3502843447.

The spelling of 79147147 in words is "seventy-nine million, one hundred forty-seven thousand, one hundred forty-seven".