80785799 has 2 divisors, whose sum is σ = 80785800. Its totient is φ = 80785798.

The previous prime is 80785787. The next prime is 80785801. The reversal of 80785799 is 99758708.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80785799 - 2⁸ = 80785543 is a prime.

Together with 80785801, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80785799.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80785709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40392899 + 40392900.

It is an arithmetic number, because the mean of its divisors is an integer number (40392900).

Almost surely, 2^80785799 is an apocalyptic number.

80785799 is a deficient number, since it is larger than the sum of its proper divisors (1).

80785799 is an equidigital number, since it uses as much as digits as its factorization.

80785799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1270080, while the sum is 53.

The square root of 80785799 is about 8988.0920667292. The cubic root of 80785799 is about 432.2931377348.

The spelling of 80785799 in words is "eighty million, seven hundred eighty-five thousand, seven hundred ninety-nine".