438891113 has 2 divisors, whose sum is σ = 438891114. Its totient is φ = 438891112.

The previous prime is 438891109. The next prime is 438891121. The reversal of 438891113 is 311198834.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 332223529 + 106667584 = 18227^2 + 10328^2 .

It is a cyclic number.

It is not a de Polignac number, because 438891113 - 2² = 438891109 is a prime.

It is not a weakly prime, because it can be changed into another prime (438897113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219445556 + 219445557.

It is an arithmetic number, because the mean of its divisors is an integer number (219445557).

Almost surely, 2^438891113 is an apocalyptic number.

It is an amenable number.

438891113 is a deficient number, since it is larger than the sum of its proper divisors (1).

438891113 is an equidigital number, since it uses as much as digits as its factorization.

438891113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 38.

The square root of 438891113 is about 20949.7282321275. The cubic root of 438891113 is about 759.9510084994.

The spelling of 438891113 in words is "four hundred thirty-eight million, eight hundred ninety-one thousand, one hundred thirteen".