190220293 has 8 divisors (see below), whose sum is σ = 206853912. Its totient is φ = 174191616.

The previous prime is 190220263. The next prime is 190220299. The reversal of 190220293 is 392022091.

It can be written as a sum of positive squares in 4 ways, for example, as 104509729 + 85710564 = 10223^2 + 9258^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 190220293 - 2⁹ = 190219781 is a prime.

It is a Duffinian number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 150580 + ... + 151837.

It is an arithmetic number, because the mean of its divisors is an integer number (25856739).

Almost surely, 2^190220293 is an apocalyptic number.

It is an amenable number.

190220293 is a deficient number, since it is larger than the sum of its proper divisors (16633619).

190220293 is a wasteful number, since it uses less digits than its factorization.

190220293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302471.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 190220293 is about 13792.0373041839. The cubic root of 190220293 is about 575.1118048499. Note that the first 3 decimals are identical.

The spelling of 190220293 in words is "one hundred ninety million, two hundred twenty thousand, two hundred ninety-three".