190955681 has 16 divisors (see below), whose sum is σ = 233496960. Its totient is φ = 152513280.

The previous prime is 190955671. The next prime is 190955711. The reversal of 190955681 is 186559091.

It is a cyclic number.

It is not a de Polignac number, because 190955681 - 2⁶ = 190955617 is a prime.

It is a super-2 number, since 2×190955681² = 72928144212347522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190955671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3656 + ... + 19881.

It is an arithmetic number, because the mean of its divisors is an integer number (14593560).

Almost surely, 2^190955681 is an apocalyptic number.

It is an amenable number.

190955681 is a deficient number, since it is larger than the sum of its proper divisors (42541279).

190955681 is a wasteful number, since it uses less digits than its factorization.

190955681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23624.

The product of its (nonzero) digits is 97200, while the sum is 44.

The square root of 190955681 is about 13818.6714629157. The cubic root of 190955681 is about 575.8519755705.

The spelling of 190955681 in words is "one hundred ninety million, nine hundred fifty-five thousand, six hundred eighty-one".