79440550097 has 2 divisors, whose sum is σ = 79440550098. Its totient is φ = 79440550096.

The previous prime is 79440550069. The next prime is 79440550117. The reversal of 79440550097 is 79005504497.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79321652881 + 118897216 = 281641^2 + 10904^2 .

It is a cyclic number.

It is not a de Polignac number, because 79440550097 - 2¹⁶ = 79440484561 is a prime.

It is not a weakly prime, because it can be changed into another prime (79440550037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39720275048 + 39720275049.

It is an arithmetic number, because the mean of its divisors is an integer number (39720275049).

Almost surely, 2^79440550097 is an apocalyptic number.

It is an amenable number.

79440550097 is a deficient number, since it is larger than the sum of its proper divisors (1).

79440550097 is an equidigital number, since it uses as much as digits as its factorization.

79440550097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1587600, while the sum is 50.

The spelling of 79440550097 in words is "seventy-nine billion, four hundred forty million, five hundred fifty thousand, ninety-seven".