199590969 has 4 divisors (see below), whose sum is σ = 266121296. Its totient is φ = 133060644.

The previous prime is 199590967. The next prime is 199590971. The reversal of 199590969 is 969095991.

199590969 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 an interprime number because it is at equal distance from previous prime (199590967) and next prime (199590971).

It is not a de Polignac number, because 199590969 - 2¹ = 199590967 is a prime.

It is a super-2 number, since 2×199590969² = 79673109812717922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199590967) 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, 33265159 + ... + 33265164.

It is an arithmetic number, because the mean of its divisors is an integer number (66530324).

Almost surely, 2^199590969 is an apocalyptic number.

It is an amenable number.

199590969 is a deficient number, since it is larger than the sum of its proper divisors (66530327).

199590969 is an equidigital number, since it uses as much as digits as its factorization.

199590969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66530326.

The product of its (nonzero) digits is 1771470, while the sum is 57.

The square root of 199590969 is about 14127.6667925033. Note that the first 3 decimals coincide. The cubic root of 199590969 is about 584.4046042520.

The spelling of 199590969 in words is "one hundred ninety-nine million, five hundred ninety thousand, nine hundred sixty-nine".