189613831 has 4 divisors (see below), whose sum is σ = 206851464. Its totient is φ = 172376200.

The previous prime is 189613813. The next prime is 189613843. The reversal of 189613831 is 138316981.

189613831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 189613831 - 2¹³ = 189605639 is a prime.

It is a super-2 number, since 2×189613831² = 71906809812993122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189613811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8618800 + ... + 8618821.

It is an arithmetic number, because the mean of its divisors is an integer number (51712866).

Almost surely, 2^189613831 is an apocalyptic number.

189613831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

189613831 is a deficient number, since it is larger than the sum of its proper divisors (17237633).

189613831 is a wasteful number, since it uses less digits than its factorization.

189613831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17237632.

The product of its digits is 31104, while the sum is 40.

The square root of 189613831 is about 13770.0338053325. The cubic root of 189613831 is about 574.4999620007.

The spelling of 189613831 in words is "one hundred eighty-nine million, six hundred thirteen thousand, eight hundred thirty-one".