438091 has 2 divisors, whose sum is σ = 438092. Its totient is φ = 438090.

The previous prime is 438049. The next prime is 438131. The reversal of 438091 is 190834.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 438091 - 2¹³ = 429899 is a prime.

It is not a weakly prime, because it can be changed into another prime (438001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219045 + 219046.

It is an arithmetic number, because the mean of its divisors is an integer number (219046).

2⁴³⁸⁰⁹¹ is an apocalyptic number.

438091 is a deficient number, since it is larger than the sum of its proper divisors (1).

438091 is an equidigital number, since it uses as much as digits as its factorization.

438091 is an evil number, because the sum of its binary digits is even.

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

The square root of 438091 is about 661.8844309999. The cubic root of 438091 is about 75.9488922320.

The spelling of 438091 in words is "four hundred thirty-eight thousand, ninety-one".