200390191 has 16 divisors (see below), whose sum is σ = 218059776. Its totient is φ = 183639456.

The previous prime is 200390159. The next prime is 200390221. The reversal of 200390191 is 191093002.

It is a 5-Lehmer number, since φ(200390191) divides (200390191-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 200390191 - 2⁵ = 200390159 is a prime.

It is a pancake number, because a pancake can be divided into 200390191 parts by 20019 straight cuts.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200390291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50506 + ... + 54328.

It is an arithmetic number, because the mean of its divisors is an integer number (13628736).

Almost surely, 2^200390191 is an apocalyptic number.

200390191 is a deficient number, since it is larger than the sum of its proper divisors (17669585).

200390191 is a wasteful number, since it uses less digits than its factorization.

200390191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3942.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 200390191 is about 14155.9242368699. The cubic root of 200390191 is about 585.1836090571.

The spelling of 200390191 in words is "two hundred million, three hundred ninety thousand, one hundred ninety-one".