190873261 has 4 divisors (see below), whose sum is σ = 190921500. Its totient is φ = 190825024.

The previous prime is 190873237. The next prime is 190873283. The reversal of 190873261 is 162378091.

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 86955625 + 103917636 = 9325^2 + 10194^2 .

It is a cyclic number.

It is not a de Polignac number, because 190873261 - 2²⁵ = 157318829 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 190873261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190873961) 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, 17596 + ... + 26293.

It is an arithmetic number, because the mean of its divisors is an integer number (47730375).

Almost surely, 2^190873261 is an apocalyptic number.

It is an amenable number.

190873261 is a deficient number, since it is larger than the sum of its proper divisors (48239).

190873261 is an equidigital number, since it uses as much as digits as its factorization.

190873261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48238.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 190873261 is about 13815.6889440954. The cubic root of 190873261 is about 575.7691141972.

The spelling of 190873261 in words is "one hundred ninety million, eight hundred seventy-three thousand, two hundred sixty-one".