438701321 has 2 divisors, whose sum is σ = 438701322. Its totient is φ = 438701320.

The previous prime is 438701309. The next prime is 438701323. The reversal of 438701321 is 123107834.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 416976400 + 21724921 = 20420^2 + 4661^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438701321 is a prime.

Together with 438701323, 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 (438701323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219350660 + 219350661.

It is an arithmetic number, because the mean of its divisors is an integer number (219350661).

Almost surely, 2^438701321 is an apocalyptic number.

It is an amenable number.

438701321 is a deficient number, since it is larger than the sum of its proper divisors (1).

438701321 is an equidigital number, since it uses as much as digits as its factorization.

438701321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 438701321 is about 20945.1980415560. The cubic root of 438701321 is about 759.8414494972.

The spelling of 438701321 in words is "four hundred thirty-eight million, seven hundred one thousand, three hundred twenty-one".