79808147 has 2 divisors, whose sum is σ = 79808148. Its totient is φ = 79808146.

The previous prime is 79808143. The next prime is 79808153. The reversal of 79808147 is 74180897.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79808147 - 2² = 79808143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79808098 and 79808107.

It is not a weakly prime, because it can be changed into another prime (79808143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39904073 + 39904074.

It is an arithmetic number, because the mean of its divisors is an integer number (39904074).

Almost surely, 2^79808147 is an apocalyptic number.

79808147 is a deficient number, since it is larger than the sum of its proper divisors (1).

79808147 is an equidigital number, since it uses as much as digits as its factorization.

79808147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 79808147 is about 8933.5405635168. The cubic root of 79808147 is about 430.5422166613.

The spelling of 79808147 in words is "seventy-nine million, eight hundred eight thousand, one hundred forty-seven".