438742873 has 2 divisors, whose sum is σ = 438742874. Its totient is φ = 438742872.

The previous prime is 438742859. The next prime is 438742877. The reversal of 438742873 is 378247834.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 431517529 + 7225344 = 20773^2 + 2688^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438742873 is a prime.

It is not a weakly prime, because it can be changed into another prime (438742877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219371436 + 219371437.

It is an arithmetic number, because the mean of its divisors is an integer number (219371437).

Almost surely, 2^438742873 is an apocalyptic number.

It is an amenable number.

438742873 is a deficient number, since it is larger than the sum of its proper divisors (1).

438742873 is an equidigital number, since it uses as much as digits as its factorization.

438742873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 903168, while the sum is 46.

The square root of 438742873 is about 20946.1899399390. The cubic root of 438742873 is about 759.8654384343.

The spelling of 438742873 in words is "four hundred thirty-eight million, seven hundred forty-two thousand, eight hundred seventy-three".