85504799 has 2 divisors, whose sum is σ = 85504800. Its totient is φ = 85504798.

The previous prime is 85504787. The next prime is 85504801. The reversal of 85504799 is 99740558.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85504799 - 2²⁰ = 84456223 is a prime.

It is a super-2 number, since 2×85504799² = 14622141304060802, which contains 22 as substring.

Together with 85504801, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85504739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42752399 + 42752400.

It is an arithmetic number, because the mean of its divisors is an integer number (42752400).

Almost surely, 2^85504799 is an apocalyptic number.

85504799 is a deficient number, since it is larger than the sum of its proper divisors (1).

85504799 is an equidigital number, since it uses as much as digits as its factorization.

85504799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 453600, while the sum is 47.

The square root of 85504799 is about 9246.8805010122. The cubic root of 85504799 is about 440.5516479609.

The spelling of 85504799 in words is "eighty-five million, five hundred four thousand, seven hundred ninety-nine".