438131 has 2 divisors, whose sum is σ = 438132. Its totient is φ = 438130.

The previous prime is 438091. The next prime is 438133. The reversal of 438131 is 131834.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438131 is a prime.

It is a super-2 number, since 2×438131² = 383917546322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 438133, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (438133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219065 + 219066.

It is an arithmetic number, because the mean of its divisors is an integer number (219066).

2⁴³⁸¹³¹ is an apocalyptic number.

438131 is a deficient number, since it is larger than the sum of its proper divisors (1).

438131 is an equidigital number, since it uses as much as digits as its factorization.

438131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 20.

The square root of 438131 is about 661.9146470656. The cubic root of 438131 is about 75.9512036721.

Adding to 438131 its reverse (131834), we get a palindrome (569965).

The spelling of 438131 in words is "four hundred thirty-eight thousand, one hundred thirty-one".