85569939 has 120 divisors (see below), whose sum is σ = 170058240. Its totient is φ = 41850432.

The previous prime is 85569917. The next prime is 85569961. The reversal of 85569939 is 93996558.

It is an interprime number because it is at equal distance from previous prime (85569917) and next prime (85569961).

It is not a de Polignac number, because 85569939 - 2⁹ = 85569427 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85569989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 1820614 + ... + 1820660.

It is an arithmetic number, because the mean of its divisors is an integer number (1417152).

Almost surely, 2^85569939 is an apocalyptic number.

85569939 is a deficient number, since it is larger than the sum of its proper divisors (84488301).

85569939 is a wasteful number, since it uses less digits than its factorization.

85569939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111 (or 89 counting only the distinct ones).

The product of its digits is 2624400, while the sum is 54.

The square root of 85569939 is about 9250.4020993684. The cubic root of 85569939 is about 440.6634945092.

The spelling of 85569939 in words is "eighty-five million, five hundred sixty-nine thousand, nine hundred thirty-nine".