190898681 has 16 divisors (see below), whose sum is σ = 205920000. Its totient is φ = 176432256.

The previous prime is 190898671. The next prime is 190898693. The reversal of 190898681 is 186898091.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 190898681 - 2²² = 186704377 is a prime.

It is a super-2 number, since 2×190898681² = 72884612815079522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190898671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132875 + ... + 134303.

It is an arithmetic number, because the mean of its divisors is an integer number (12870000).

Almost surely, 2^190898681 is an apocalyptic number.

It is an amenable number.

190898681 is a deficient number, since it is larger than the sum of its proper divisors (15021319).

190898681 is a wasteful number, since it uses less digits than its factorization.

190898681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1616.

The product of its (nonzero) digits is 248832, while the sum is 50.

The square root of 190898681 is about 13816.6088820665. The cubic root of 190898681 is about 575.7946728692.

The spelling of 190898681 in words is "one hundred ninety million, eight hundred ninety-eight thousand, six hundred eighty-one".