189181377 has 24 divisors (see below), whose sum is σ = 340691520. Its totient is φ = 98275680.

The previous prime is 189181373. The next prime is 189181397. The reversal of 189181377 is 773181981.

It is a happy number.

189181377 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 189181377 - 2² = 189181373 is a prime.

It is a super-2 number, since 2×189181377² = 71579186807232258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (189181373) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 135802 + ... + 137187.

It is an arithmetic number, because the mean of its divisors is an integer number (14195480).

Almost surely, 2^189181377 is an apocalyptic number.

It is an amenable number.

189181377 is a deficient number, since it is larger than the sum of its proper divisors (151510143).

189181377 is a wasteful number, since it uses less digits than its factorization.

189181377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273013 (or 273010 counting only the distinct ones).

The product of its digits is 84672, while the sum is 45.

The square root of 189181377 is about 13754.3221207008. The cubic root of 189181377 is about 574.0628737677.

The spelling of 189181377 in words is "one hundred eighty-nine million, one hundred eighty-one thousand, three hundred seventy-seven".