79099590091 has 2 divisors, whose sum is σ = 79099590092. Its totient is φ = 79099590090.

The previous prime is 79099590019. The next prime is 79099590109. The reversal of 79099590091 is 19009599097.

Together with next prime (79099590109) it forms an Ormiston pair, because they use the same digits, order apart.

Together with previous prime (79099590019) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79099590091 - 2¹⁵ = 79099557323 is a prime.

It is not a weakly prime, because it can be changed into another prime (79099590391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39549795045 + 39549795046.

It is an arithmetic number, because the mean of its divisors is an integer number (39549795046).

Almost surely, 2^79099590091 is an apocalyptic number.

79099590091 is a deficient number, since it is larger than the sum of its proper divisors (1).

79099590091 is an equidigital number, since it uses as much as digits as its factorization.

79099590091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2066715, while the sum is 58.

The spelling of 79099590091 in words is "seventy-nine billion, ninety-nine million, five hundred ninety thousand, ninety-one".