188973081 has 36 divisors (see below), whose sum is σ = 311192336. Its totient is φ = 114511320.

The previous prime is 188973073. The next prime is 188973101. The reversal of 188973081 is 180379881.

It is not a de Polignac number, because 188973081 - 2³ = 188973073 is a prime.

It is a super-2 number, since 2×188973081² = 71421650685265122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (188973011) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 26190 + ... + 32616.

Almost surely, 2^188973081 is an apocalyptic number.

188973081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

188973081 is a deficient number, since it is larger than the sum of its proper divisors (122219255).

188973081 is an equidigital number, since it uses as much as digits as its factorization.

188973081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6464 (or 6441 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 45.

The square root of 188973081 is about 13746.7480154399. The cubic root of 188973081 is about 573.8521079325.

The spelling of 188973081 in words is "one hundred eighty-eight million, nine hundred seventy-three thousand, eighty-one".