190093681 has 2 divisors, whose sum is σ = 190093682. Its totient is φ = 190093680.

The previous prime is 190093667. The next prime is 190093691. The reversal of 190093681 is 186390091.

190093681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171741025 + 18352656 = 13105^2 + 4284^2 .

It is a cyclic number.

It is not a de Polignac number, because 190093681 - 2¹¹ = 190091633 is a prime.

It is a super-2 number, since 2×190093681² = 72271215112259522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 190093681.

It is not a weakly prime, because it can be changed into another prime (190093601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95046840 + 95046841.

It is an arithmetic number, because the mean of its divisors is an integer number (95046841).

Almost surely, 2^190093681 is an apocalyptic number.

It is an amenable number.

190093681 is a deficient number, since it is larger than the sum of its proper divisors (1).

190093681 is an equidigital number, since it uses as much as digits as its factorization.

190093681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 190093681 is about 13787.4465003495. The cubic root of 190093681 is about 574.9841770063.

The spelling of 190093681 in words is "one hundred ninety million, ninety-three thousand, six hundred eighty-one".