79487484217 has 2 divisors, whose sum is σ = 79487484218. Its totient is φ = 79487484216.

The previous prime is 79487484191. The next prime is 79487484229. The reversal of 79487484217 is 71248478497.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61297837056 + 18189647161 = 247584^2 + 134869^2 .

It is a cyclic number.

It is not a de Polignac number, because 79487484217 - 2²³ = 79479095609 is a prime.

It is not a weakly prime, because it can be changed into another prime (79487484277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39743742108 + 39743742109.

It is an arithmetic number, because the mean of its divisors is an integer number (39743742109).

Almost surely, 2^79487484217 is an apocalyptic number.

It is an amenable number.

79487484217 is a deficient number, since it is larger than the sum of its proper divisors (1).

79487484217 is an equidigital number, since it uses as much as digits as its factorization.

79487484217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25288704, while the sum is 61.

The spelling of 79487484217 in words is "seventy-nine billion, four hundred eighty-seven million, four hundred eighty-four thousand, two hundred seventeen".