188834431 has 4 divisors (see below), whose sum is σ = 188992864. Its totient is φ = 188676000.

The previous prime is 188834381. The next prime is 188834441. The reversal of 188834431 is 134438881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134438881 = 131 ⋅1026251.

It is a cyclic number.

It is not a de Polignac number, because 188834431 - 2²⁷ = 54616703 is a prime.

It is a super-2 number, since 2×188834431² = 71316884662187522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188834441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77415 + ... + 79816.

It is an arithmetic number, because the mean of its divisors is an integer number (47248216).

Almost surely, 2^188834431 is an apocalyptic number.

188834431 is a deficient number, since it is larger than the sum of its proper divisors (158433).

188834431 is a wasteful number, since it uses less digits than its factorization.

188834431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158432.

The product of its digits is 73728, while the sum is 40.

The square root of 188834431 is about 13741.7040791890. The cubic root of 188834431 is about 573.7117280414.

The spelling of 188834431 in words is "one hundred eighty-eight million, eight hundred thirty-four thousand, four hundred thirty-one".