79518847 has 2 divisors, whose sum is σ = 79518848. Its totient is φ = 79518846.

The previous prime is 79518799. The next prime is 79518851. The reversal of 79518847 is 74881597.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79518847 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79518847.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79518547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39759423 + 39759424.

It is an arithmetic number, because the mean of its divisors is an integer number (39759424).

Almost surely, 2^79518847 is an apocalyptic number.

79518847 is a deficient number, since it is larger than the sum of its proper divisors (1).

79518847 is an equidigital number, since it uses as much as digits as its factorization.

79518847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 49.

The square root of 79518847 is about 8917.3340747109. The cubic root of 79518847 is about 430.0213564298.

The spelling of 79518847 in words is "seventy-nine million, five hundred eighteen thousand, eight hundred forty-seven".