238291 has 2 divisors, whose sum is σ = 238292. Its totient is φ = 238290.

The previous prime is 238267. The next prime is 238307. The reversal of 238291 is 192832.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 238291 - 2⁷ = 238163 is a prime.

It is an Ulam number.

238291 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (238201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119145 + 119146.

It is an arithmetic number, because the mean of its divisors is an integer number (119146).

2²³⁸²⁹¹ is an apocalyptic number.

238291 is a deficient number, since it is larger than the sum of its proper divisors (1).

238291 is an equidigital number, since it uses as much as digits as its factorization.

238291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 25.

The square root of 238291 is about 488.1505915186. The cubic root of 238291 is about 61.9967913705.

It can be divided in two parts, 238 and 291, that added together give a square (529 = 23²).

The spelling of 238291 in words is "two hundred thirty-eight thousand, two hundred ninety-one".