189656685 has 24 divisors (see below), whose sum is σ = 329142840. Its totient is φ = 101025792.

The previous prime is 189656669. The next prime is 189656713. The reversal of 189656685 is 586656981.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 39765636 + 149891049 = 6306^2 + 12243^2 .

It is not a de Polignac number, because 189656685 - 2⁴ = 189656669 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43317 + ... + 47493.

It is an arithmetic number, because the mean of its divisors is an integer number (13714285).

Almost surely, 2^189656685 is an apocalyptic number.

189656685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

189656685 is a deficient number, since it is larger than the sum of its proper divisors (139486155).

189656685 is a wasteful number, since it uses less digits than its factorization.

189656685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5197 (or 5194 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 54.

The square root of 189656685 is about 13771.5897775093. The cubic root of 189656685 is about 574.5432390246.

The spelling of 189656685 in words is "one hundred eighty-nine million, six hundred fifty-six thousand, six hundred eighty-five".