190801081 has 4 divisors (see below), whose sum is σ = 202024692. Its totient is φ = 179577472.

The previous prime is 190801057. The next prime is 190801087. The reversal of 190801081 is 180108091.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 119246400 + 71554681 = 10920^2 + 8459^2 .

It is a cyclic number.

It is not a de Polignac number, because 190801081 - 2⁹ = 190800569 is a prime.

It is a super-2 number, since 2×190801081² = 72810105021537122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190801087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5611780 + ... + 5611813.

It is an arithmetic number, because the mean of its divisors is an integer number (50506173).

Almost surely, 2^190801081 is an apocalyptic number.

It is an amenable number.

190801081 is a deficient number, since it is larger than the sum of its proper divisors (11223611).

190801081 is a wasteful number, since it uses less digits than its factorization.

190801081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11223610.

The product of its (nonzero) digits is 576, while the sum is 28.

The square root of 190801081 is about 13813.0764495097. The cubic root of 190801081 is about 575.6965280665.

It can be divided in two parts, 1908010 and 81, that added together give a palindrome (1908091).

The spelling of 190801081 in words is "one hundred ninety million, eight hundred one thousand, eighty-one".