79752191 has 2 divisors, whose sum is σ = 79752192. Its totient is φ = 79752190.

The previous prime is 79752173. The next prime is 79752203. The reversal of 79752191 is 19125797.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79752191 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79752161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39876095 + 39876096.

It is an arithmetic number, because the mean of its divisors is an integer number (39876096).

Almost surely, 2^79752191 is an apocalyptic number.

79752191 is a deficient number, since it is larger than the sum of its proper divisors (1).

79752191 is an equidigital number, since it uses as much as digits as its factorization.

79752191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39690, while the sum is 41.

The square root of 79752191 is about 8930.4082213525. The cubic root of 79752191 is about 430.4415709094.

The spelling of 79752191 in words is "seventy-nine million, seven hundred fifty-two thousand, one hundred ninety-one".