190081 has 4 divisors (see below), whose sum is σ = 191664. Its totient is φ = 188500.

The previous prime is 190063. The next prime is 190093. The reversal of 190081 is 180091.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 180091 = 73 ⋅2467.

It is a cyclic number.

It is not a de Polignac number, because 190081 - 2¹³ = 181889 is a prime.

It is a super-2 number, since 2×190081² = 72261573122, which contains 22 as substring.

It is a Duffinian number.

190081 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (190031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 595 + ... + 856.

It is an arithmetic number, because the mean of its divisors is an integer number (47916).

2¹⁹⁰⁰⁸¹ is an apocalyptic number.

It is an amenable number.

190081 is a deficient number, since it is larger than the sum of its proper divisors (1583).

190081 is a wasteful number, since it uses less digits than its factorization.

190081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1582.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 190081 is about 435.9827978258. The cubic root of 190081 is about 57.4971391141.

The spelling of 190081 in words is "one hundred ninety thousand, eighty-one".