190122809 has 4 divisors (see below), whose sum is σ = 191078400. Its totient is φ = 189167220.

The previous prime is 190122767. The next prime is 190122833. The reversal of 190122809 is 908221091.

It is a happy number.

190122809 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 190122809 - 2⁸ = 190122553 is a prime.

It is a super-2 number, since 2×190122809² = 72293365004100962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190127809) 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, 477497 + ... + 477894.

It is an arithmetic number, because the mean of its divisors is an integer number (47769600).

Almost surely, 2^190122809 is an apocalyptic number.

It is an amenable number.

190122809 is a deficient number, since it is larger than the sum of its proper divisors (955591).

190122809 is an equidigital number, since it uses as much as digits as its factorization.

190122809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955590.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 190122809 is about 13788.5027831161. The cubic root of 190122809 is about 575.0135437264.

The spelling of 190122809 in words is "one hundred ninety million, one hundred twenty-two thousand, eight hundred nine".