190117129 has 4 divisors (see below), whose sum is σ = 190275076. Its totient is φ = 189959184.

The previous prime is 190117121. The next prime is 190117163. The reversal of 190117129 is 921711091.

It is a happy number.

190117129 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.

It can be written as a sum of positive squares in 2 ways, for example, as 40005625 + 150111504 = 6325^2 + 12252^2 .

It is a cyclic number.

It is not a de Polignac number, because 190117129 - 2³ = 190117121 is a prime.

It is a super-2 number, since 2×190117129² = 72289045478405282, which contains 22 as substring.

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 190117129.

It is not an unprimeable number, because it can be changed into a prime (190117121) 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, 77154 + ... + 79579.

It is an arithmetic number, because the mean of its divisors is an integer number (47568769).

Almost surely, 2^190117129 is an apocalyptic number.

It is an amenable number.

190117129 is a deficient number, since it is larger than the sum of its proper divisors (157947).

190117129 is a wasteful number, since it uses less digits than its factorization.

190117129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157946.

The product of its (nonzero) digits is 1134, while the sum is 31.

The square root of 190117129 is about 13788.2968128772. The cubic root of 190117129 is about 575.0078174110.

The spelling of 190117129 in words is "one hundred ninety million, one hundred seventeen thousand, one hundred twenty-nine".