188730929 has 4 divisors (see below), whose sum is σ = 189161280. Its totient is φ = 188300580.

The previous prime is 188730907. The next prime is 188730943. The reversal of 188730929 is 929037881.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-188730929 is a prime.

It is a super-2 number, since 2×188730929² = 71238727122406082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (188730989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214517 + ... + 215394.

It is an arithmetic number, because the mean of its divisors is an integer number (47290320).

Almost surely, 2^188730929 is an apocalyptic number.

It is an amenable number.

188730929 is a deficient number, since it is larger than the sum of its proper divisors (430351).

188730929 is an equidigital number, since it uses as much as digits as its factorization.

188730929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430350.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 188730929 is about 13737.9375817479. The cubic root of 188730929 is about 573.6068898802.

The spelling of 188730929 in words is "one hundred eighty-eight million, seven hundred thirty thousand, nine hundred twenty-nine".