190996181 has 2 divisors, whose sum is σ = 190996182. Its totient is φ = 190996180.

The previous prime is 190996171. The next prime is 190996199. The reversal of 190996181 is 181699091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114276100 + 76720081 = 10690^2 + 8759^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190996181 is a prime.

It is a super-2 number, since 2×190996181² = 72959082313169522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190996121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95498090 + 95498091.

It is an arithmetic number, because the mean of its divisors is an integer number (95498091).

Almost surely, 2^190996181 is an apocalyptic number.

It is an amenable number.

190996181 is a deficient number, since it is larger than the sum of its proper divisors (1).

190996181 is an equidigital number, since it uses as much as digits as its factorization.

190996181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 44.

The square root of 190996181 is about 13820.1367938237. The cubic root of 190996181 is about 575.8926837186.

The spelling of 190996181 in words is "one hundred ninety million, nine hundred ninety-six thousand, one hundred eighty-one".