189930477 has 32 divisors (see below), whose sum is σ = 296110080. Its totient is φ = 107006720.

The previous prime is 189930439. The next prime is 189930497. The reversal of 189930477 is 774039981.

It is a cyclic number.

It is not a de Polignac number, because 189930477 - 2¹¹ = 189928429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189930407) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44524 + ... + 48602.

It is an arithmetic number, because the mean of its divisors is an integer number (9253440).

Almost surely, 2^189930477 is an apocalyptic number.

189930477 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

189930477 is a deficient number, since it is larger than the sum of its proper divisors (106179603).

189930477 is a wasteful number, since it uses less digits than its factorization.

189930477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4193.

The product of its (nonzero) digits is 381024, while the sum is 48.

The square root of 189930477 is about 13781.5266570870. The cubic root of 189930477 is about 574.8195799417.

The spelling of 189930477 in words is "one hundred eighty-nine million, nine hundred thirty thousand, four hundred seventy-seven".