189696861 has 12 divisors (see below), whose sum is σ = 275539680. Its totient is φ = 125757000.

The previous prime is 189696853. The next prime is 189696901. The reversal of 189696861 is 168696981.

It is not a de Polignac number, because 189696861 - 2³ = 189696853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 189696798 and 189696807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189696821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57265 + ... + 60486.

It is an arithmetic number, because the mean of its divisors is an integer number (22961640).

Almost surely, 2^189696861 is an apocalyptic number.

It is an amenable number.

189696861 is a deficient number, since it is larger than the sum of its proper divisors (85842819).

189696861 is a wasteful number, since it uses less digits than its factorization.

189696861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117936 (or 117933 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The square root of 189696861 is about 13773.0483553932. The cubic root of 189696861 is about 574.5838056928.

The spelling of 189696861 in words is "one hundred eighty-nine million, six hundred ninety-six thousand, eight hundred sixty-one".