200142091 has 4 divisors (see below), whose sum is σ = 200921112. Its totient is φ = 199363072.

The previous prime is 200142083. The next prime is 200142119. The reversal of 200142091 is 190241002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 200142091 - 2³ = 200142083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200142001) 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, 389125 + ... + 389638.

It is an arithmetic number, because the mean of its divisors is an integer number (50230278).

Almost surely, 2^200142091 is an apocalyptic number.

200142091 is a deficient number, since it is larger than the sum of its proper divisors (779021).

200142091 is an equidigital number, since it uses as much as digits as its factorization.

200142091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779020.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 200142091 is about 14147.1584072562. The cubic root of 200142091 is about 584.9420070595.

Adding to 200142091 its reverse (190241002), we get a palindrome (390383093).

The spelling of 200142091 in words is "two hundred million, one hundred forty-two thousand, ninety-one".