189372261 has 8 divisors (see below), whose sum is σ = 271919200. Its totient is φ = 116536752.

The previous prime is 189372229. The next prime is 189372263. The reversal of 189372261 is 162273981.

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

It is not a de Polignac number, because 189372261 - 2⁵ = 189372229 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 4855699 = 189372261 / (1 + 8 + 9 + 3 + 7 + 2 + 2 + 6 + 1).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189372263) 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, 2427811 + ... + 2427888.

It is an arithmetic number, because the mean of its divisors is an integer number (33989900).

Almost surely, 2^189372261 is an apocalyptic number.

It is an amenable number.

189372261 is a deficient number, since it is larger than the sum of its proper divisors (82546939).

189372261 is a wasteful number, since it uses less digits than its factorization.

189372261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4855715.

The product of its digits is 36288, while the sum is 39.

The square root of 189372261 is about 13761.2594263752. The cubic root of 189372261 is about 574.2558853364.

The spelling of 189372261 in words is "one hundred eighty-nine million, three hundred seventy-two thousand, two hundred sixty-one".