202391 has 8 divisors (see below), whose sum is σ = 239520. Its totient is φ = 167328.

The previous prime is 202387. The next prime is 202393. The reversal of 202391 is 193202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 202391 - 2² = 202387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 296 + ... + 701.

It is an arithmetic number, because the mean of its divisors is an integer number (29940).

2²⁰²³⁹¹ is an apocalyptic number.

202391 is a deficient number, since it is larger than the sum of its proper divisors (37129).

202391 is an equidigital number, since it uses as much as digits as its factorization.

202391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 202391 is about 449.8788725868. The cubic root of 202391 is about 58.7124764161.

Adding to 202391 its reverse (193202), we get a palindrome (395593).

The spelling of 202391 in words is "two hundred two thousand, three hundred ninety-one".