189350861 has 16 divisors (see below), whose sum is σ = 219706368. Its totient is φ = 159840000.

The previous prime is 189350809. The next prime is 189350873. The reversal of 189350861 is 168053981.

189350861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 189350861 - 2¹⁴ = 189334477 is a prime.

It is a super-2 number, since 2×189350861² = 71707497122882642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189350891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157061 + ... + 158261.

It is an arithmetic number, because the mean of its divisors is an integer number (13731648).

Almost surely, 2^189350861 is an apocalyptic number.

It is an amenable number.

189350861 is a deficient number, since it is larger than the sum of its proper divisors (30355507).

189350861 is a wasteful number, since it uses less digits than its factorization.

189350861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1532.

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 189350861 is about 13760.4818592955. The cubic root of 189350861 is about 574.2342532720.

The spelling of 189350861 in words is "one hundred eighty-nine million, three hundred fifty thousand, eight hundred sixty-one".