85098989 has 4 divisors (see below), whose sum is σ = 85157856. Its totient is φ = 85040124.

The previous prime is 85098983. The next prime is 85099009. The reversal of 85098989 is 98989058.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85098989 - 2⁸ = 85098733 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85098983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27209 + ... + 30174.

It is an arithmetic number, because the mean of its divisors is an integer number (21289464).

Almost surely, 2^85098989 is an apocalyptic number.

It is an amenable number.

85098989 is a deficient number, since it is larger than the sum of its proper divisors (58867).

85098989 is a wasteful number, since it uses less digits than its factorization.

85098989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58866.

The product of its (nonzero) digits is 1866240, while the sum is 56.

The square root of 85098989 is about 9224.9113274871. The cubic root of 85098989 is about 439.8535824808.

The spelling of 85098989 in words is "eighty-five million, ninety-eight thousand, nine hundred eighty-nine".