79812247 has 2 divisors, whose sum is σ = 79812248. Its totient is φ = 79812246.

The previous prime is 79812193. The next prime is 79812253. The reversal of 79812247 is 74221897.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79812247 - 2¹⁹ = 79287959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79812547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39906123 + 39906124.

It is an arithmetic number, because the mean of its divisors is an integer number (39906124).

Almost surely, 2^79812247 is an apocalyptic number.

79812247 is a deficient number, since it is larger than the sum of its proper divisors (1).

79812247 is an equidigital number, since it uses as much as digits as its factorization.

79812247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 40.

The square root of 79812247 is about 8933.7700328585. The cubic root of 79812247 is about 430.5495893123.

The spelling of 79812247 in words is "seventy-nine million, eight hundred twelve thousand, two hundred forty-seven".