85998499 has 2 divisors, whose sum is σ = 85998500. Its totient is φ = 85998498.

The previous prime is 85998491. The next prime is 85998533. The reversal of 85998499 is 99489958.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85998499 - 2³ = 85998491 is a prime.

It is not a weakly prime, because it can be changed into another prime (85998491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42999249 + 42999250.

It is an arithmetic number, because the mean of its divisors is an integer number (42999250).

Almost surely, 2^85998499 is an apocalyptic number.

85998499 is a deficient number, since it is larger than the sum of its proper divisors (1).

85998499 is an equidigital number, since it uses as much as digits as its factorization.

85998499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8398080, while the sum is 61.

The square root of 85998499 is about 9273.5375666463. The cubic root of 85998499 is about 441.3979282365.

The spelling of 85998499 in words is "eighty-five million, nine hundred ninety-eight thousand, four hundred ninety-nine".