438091093 has 4 divisors (see below), whose sum is σ = 477917568. Its totient is φ = 398264620.

The previous prime is 438091079. The next prime is 438091099. The reversal of 438091093 is 390190834.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 438091093 - 2²¹ = 435993941 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 (438091099) 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, 19913221 + ... + 19913242.

It is an arithmetic number, because the mean of its divisors is an integer number (119479392).

Almost surely, 2^438091093 is an apocalyptic number.

It is an amenable number.

438091093 is a deficient number, since it is larger than the sum of its proper divisors (39826475).

438091093 is a wasteful number, since it uses less digits than its factorization.

438091093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39826474.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 438091093 is about 20930.6257192660. The cubic root of 438091093 is about 759.4889760629.

The spelling of 438091093 in words is "four hundred thirty-eight million, ninety-one thousand, ninety-three".