85618949 has 12 divisors (see below), whose sum is σ = 96746976. Its totient is φ = 75593232.

The previous prime is 85618943. The next prime is 85618961. The reversal of 85618949 is 94981658.

It is a happy number.

It is not a de Polignac number, because 85618949 - 2²⁰ = 84570373 is a prime.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85618897 and 85618906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85618943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7127 + ... + 14900.

It is an arithmetic number, because the mean of its divisors is an integer number (8062248).

Almost surely, 2^85618949 is an apocalyptic number.

It is an amenable number.

85618949 is a deficient number, since it is larger than the sum of its proper divisors (11128027).

85618949 is a wasteful number, since it uses less digits than its factorization.

85618949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22076 (or 22063 counting only the distinct ones).

The product of its digits is 622080, while the sum is 50.

The square root of 85618949 is about 9253.0507941976. The cubic root of 85618949 is about 440.7476081447.

The spelling of 85618949 in words is "eighty-five million, six hundred eighteen thousand, nine hundred forty-nine".