189739611 has 16 divisors (see below), whose sum is σ = 287078400. Its totient is φ = 123800904.

The previous prime is 189739603. The next prime is 189739631. The reversal of 189739611 is 116937981.

It is not a de Polignac number, because 189739611 - 2³ = 189739603 is a prime.

It is a super-2 number, since 2×189739611² = 72002239964862642, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (189739631) 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, 73491 + ... + 76028.

It is an arithmetic number, because the mean of its divisors is an integer number (17942400).

Almost surely, 2^189739611 is an apocalyptic number.

189739611 is a deficient number, since it is larger than the sum of its proper divisors (97338789).

189739611 is a wasteful number, since it uses less digits than its factorization.

189739611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149575 (or 149569 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The square root of 189739611 is about 13774.6002119844. The cubic root of 189739611 is about 574.6269651009.

The spelling of 189739611 in words is "one hundred eighty-nine million, seven hundred thirty-nine thousand, six hundred eleven".