190671881 has 4 divisors (see below), whose sum is σ = 201887892. Its totient is φ = 179455872.

The previous prime is 190671869. The next prime is 190671907. The reversal of 190671881 is 188176091.

190671881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 177129481 + 13542400 = 13309^2 + 3680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190671881 is a prime.

It is a super-2 number, since 2×190671881² = 72711532408156322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190671181) 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, 5607980 + ... + 5608013.

It is an arithmetic number, because the mean of its divisors is an integer number (50471973).

Almost surely, 2^190671881 is an apocalyptic number.

It is an amenable number.

190671881 is a deficient number, since it is larger than the sum of its proper divisors (11216011).

190671881 is a wasteful number, since it uses less digits than its factorization.

190671881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11216010.

The product of its (nonzero) digits is 24192, while the sum is 41.

The square root of 190671881 is about 13808.3989296370. The cubic root of 190671881 is about 575.5665553815.

The spelling of 190671881 in words is "one hundred ninety million, six hundred seventy-one thousand, eight hundred eighty-one".