85791499 has 2 divisors, whose sum is σ = 85791500. Its totient is φ = 85791498.

The previous prime is 85791491. The next prime is 85791509. The reversal of 85791499 is 99419758.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85791499 - 2³ = 85791491 is a prime.

It is not a weakly prime, because it can be changed into another prime (85791491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42895749 + 42895750.

It is an arithmetic number, because the mean of its divisors is an integer number (42895750).

Almost surely, 2^85791499 is an apocalyptic number.

85791499 is a deficient number, since it is larger than the sum of its proper divisors (1).

85791499 is an equidigital number, since it uses as much as digits as its factorization.

85791499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 52.

The square root of 85791499 is about 9262.3700530696. The cubic root of 85791499 is about 441.0434926759.

The spelling of 85791499 in words is "eighty-five million, seven hundred ninety-one thousand, four hundred ninety-nine".