85099631 has 4 divisors (see below), whose sum is σ = 85187712. Its totient is φ = 85011552.

The previous prime is 85099621. The next prime is 85099633. The reversal of 85099631 is 13699058.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85099631 - 2²² = 80905327 is a prime.

It is a super-2 number, since 2×85099631² = 14483894392672322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85099633) 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, 42575 + ... + 44528.

It is an arithmetic number, because the mean of its divisors is an integer number (21296928).

Almost surely, 2^85099631 is an apocalyptic number.

85099631 is a deficient number, since it is larger than the sum of its proper divisors (88081).

85099631 is an equidigital number, since it uses as much as digits as its factorization.

85099631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88080.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 85099631 is about 9224.9461245039. The cubic root of 85099631 is about 439.8546885860.

The spelling of 85099631 in words is "eighty-five million, ninety-nine thousand, six hundred thirty-one".