79745947 has 2 divisors, whose sum is σ = 79745948. Its totient is φ = 79745946.

The previous prime is 79745903. The next prime is 79745959. The reversal of 79745947 is 74954797.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79745947 - 2¹¹ = 79743899 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79745894 and 79745903.

It is not a weakly prime, because it can be changed into another prime (79745987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39872973 + 39872974.

It is an arithmetic number, because the mean of its divisors is an integer number (39872974).

Almost surely, 2^79745947 is an apocalyptic number.

79745947 is a deficient number, since it is larger than the sum of its proper divisors (1).

79745947 is an equidigital number, since it uses as much as digits as its factorization.

79745947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2222640, while the sum is 52.

The square root of 79745947 is about 8930.0586224280. The cubic root of 79745947 is about 430.4303371644.

The spelling of 79745947 in words is "seventy-nine million, seven hundred forty-five thousand, nine hundred forty-seven".