190220291 has 4 divisors (see below), whose sum is σ = 190273752. Its totient is φ = 190166832.

The previous prime is 190220263. The next prime is 190220299. The reversal of 190220291 is 192022091.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 192022091 = 31 ⋅6194261.

It is a cyclic number.

It is not a de Polignac number, because 190220291 - 2²⁶ = 123111427 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 190220291.

It is not an unprimeable number, because it can be changed into a prime (190220299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20981 + ... + 28646.

It is an arithmetic number, because the mean of its divisors is an integer number (47568438).

Almost surely, 2^190220291 is an apocalyptic number.

190220291 is a deficient number, since it is larger than the sum of its proper divisors (53461).

190220291 is an equidigital number, since it uses as much as digits as its factorization.

190220291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53460.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 190220291 is about 13792.0372316783. The cubic root of 190220291 is about 575.1118028343. Note that the first 3 decimals are identical.

The spelling of 190220291 in words is "one hundred ninety million, two hundred twenty thousand, two hundred ninety-one".