189934047 has 24 divisors (see below), whose sum is σ = 292374576. Its totient is φ = 118400256.

The previous prime is 189934001. The next prime is 189934057. The reversal of 189934047 is 740439981.

It is not a de Polignac number, because 189934047 - 2⁶ = 189933983 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 189933993 and 189934011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189934057) 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, 20068 + ... + 27974.

It is an arithmetic number, because the mean of its divisors is an integer number (12182274).

Almost surely, 2^189934047 is an apocalyptic number.

189934047 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

189934047 is a deficient number, since it is larger than the sum of its proper divisors (102440529).

189934047 is a wasteful number, since it uses less digits than its factorization.

189934047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8087 (or 8084 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 189934047 is about 13781.6561776878. The cubic root of 189934047 is about 574.8231814228.

The spelling of 189934047 in words is "one hundred eighty-nine million, nine hundred thirty-four thousand, forty-seven".