202891 has 4 divisors (see below), whose sum is σ = 218512. Its totient is φ = 187272.

The previous prime is 202889. The next prime is 202907. The reversal of 202891 is 198202.

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 202891 - 2¹ = 202889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202841) 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, 7791 + ... + 7816.

It is an arithmetic number, because the mean of its divisors is an integer number (54628).

2²⁰²⁸⁹¹ is an apocalyptic number.

202891 is a deficient number, since it is larger than the sum of its proper divisors (15621).

202891 is a wasteful number, since it uses less digits than its factorization.

202891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15620.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 202891 is about 450.4342349334. The cubic root of 202891 is about 58.7607857065.

The spelling of 202891 in words is "two hundred two thousand, eight hundred ninety-one".