190086981 has 8 divisors (see below), whose sum is σ = 289656384. Its totient is φ = 108621120.

The previous prime is 190086971. The next prime is 190086997. The reversal of 190086981 is 189680091.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 190086981 - 2¹⁵ = 190054213 is a prime.

It is a super-2 number, since 2×190086981² = 72266120691388722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190086901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4525860 + ... + 4525901.

It is an arithmetic number, because the mean of its divisors is an integer number (36207048).

Almost surely, 2^190086981 is an apocalyptic number.

It is an amenable number.

190086981 is a deficient number, since it is larger than the sum of its proper divisors (99569403).

190086981 is an equidigital number, since it uses as much as digits as its factorization.

190086981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9051771.

The product of its (nonzero) digits is 31104, while the sum is 42.

The square root of 190086981 is about 13787.2035235576. The cubic root of 190086981 is about 574.9774216717.

The spelling of 190086981 in words is "one hundred ninety million, eighty-six thousand, nine hundred eighty-one".