80699117 has 2 divisors, whose sum is σ = 80699118. Its totient is φ = 80699116.

The previous prime is 80699093. The next prime is 80699123. The reversal of 80699117 is 71199608.

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., 76492516 + 4206601 = 8746^2 + 2051^2 .

It is a cyclic number.

It is not a de Polignac number, because 80699117 - 2⁸ = 80698861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80699167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40349558 + 40349559.

It is an arithmetic number, because the mean of its divisors is an integer number (40349559).

Almost surely, 2^80699117 is an apocalyptic number.

It is an amenable number.

80699117 is a deficient number, since it is larger than the sum of its proper divisors (1).

80699117 is an equidigital number, since it uses as much as digits as its factorization.

80699117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 80699117 is about 8983.2687258035. The cubic root of 80699117 is about 432.1384676297.

The spelling of 80699117 in words is "eighty million, six hundred ninety-nine thousand, one hundred seventeen".