190522809 has 27 divisors (see below), whose sum is σ = 284406213. Its totient is φ = 122901912.

The previous prime is 190522789. The next prime is 190522811. The reversal of 190522809 is 908225091.

The square root of 190522809 is 13803.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 190522809 - 2¹⁹ = 189998521 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (190522889) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1780534 + ... + 1780640.

Almost surely, 2^190522809 is an apocalyptic number.

190522809 is the 13803-rd square number.

190522809 is the 6902-nd centered octagonal number.

It is an amenable number.

190522809 is a deficient number, since it is larger than the sum of its proper divisors (93883404).

190522809 is an equidigital number, since it uses as much as digits as its factorization.

190522809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The cubic root of 190522809 is about 575.4165188769.

Multiplying 190522809 by its sum of digits (36), we get a square (6858821124 = 82818²).

The spelling of 190522809 in words is "one hundred ninety million, five hundred twenty-two thousand, eight hundred nine".