79941691 has 2 divisors, whose sum is σ = 79941692. Its totient is φ = 79941690.

The previous prime is 79941671. The next prime is 79941703. The reversal of 79941691 is 19614997.

It is a strong prime.

It is an emirp because it is prime and its reverse (19614997) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79941691 - 2¹³ = 79933499 is a prime.

It is a pancake number, because a pancake can be divided into 79941691 parts by 12644 straight cuts.

It is not a weakly prime, because it can be changed into another prime (79941611) 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, 39970845 + 39970846.

It is an arithmetic number, because the mean of its divisors is an integer number (39970846).

Almost surely, 2^79941691 is an apocalyptic number.

79941691 is a deficient number, since it is larger than the sum of its proper divisors (1).

79941691 is an equidigital number, since it uses as much as digits as its factorization.

79941691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 46.

The square root of 79941691 is about 8941.0117436451. The cubic root of 79941691 is about 430.7822267853.

The spelling of 79941691 in words is "seventy-nine million, nine hundred forty-one thousand, six hundred ninety-one".