189611031 has 8 divisors (see below), whose sum is σ = 252927360. Its totient is φ = 126351032.

The previous prime is 189611027. The next prime is 189611039. The reversal of 189611031 is 130116981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 189611031 - 2² = 189611027 is a prime.

It is a super-2 number, since 2×189611031² = 71904686153765922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 189611031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189611039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5475 + ... + 20228.

It is an arithmetic number, because the mean of its divisors is an integer number (31615920).

Almost surely, 2^189611031 is an apocalyptic number.

189611031 is a deficient number, since it is larger than the sum of its proper divisors (63316329).

189611031 is a wasteful number, since it uses less digits than its factorization.

189611031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28165.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 189611031 is about 13769.9321349090. The cubic root of 189611031 is about 574.4971341342.

The spelling of 189611031 in words is "one hundred eighty-nine million, six hundred eleven thousand, thirty-one".