438316873 has 2 divisors, whose sum is σ = 438316874. Its totient is φ = 438316872.

The previous prime is 438316849. The next prime is 438316883. The reversal of 438316873 is 378613834.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 430853049 + 7463824 = 20757^2 + 2732^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438316873 is a prime.

It is not a weakly prime, because it can be changed into another prime (438316883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219158436 + 219158437.

It is an arithmetic number, because the mean of its divisors is an integer number (219158437).

Almost surely, 2^438316873 is an apocalyptic number.

It is an amenable number.

438316873 is a deficient number, since it is larger than the sum of its proper divisors (1).

438316873 is an equidigital number, since it uses as much as digits as its factorization.

438316873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 43.

The square root of 438316873 is about 20936.0185565451. The cubic root of 438316873 is about 759.6194268405.

The spelling of 438316873 in words is "four hundred thirty-eight million, three hundred sixteen thousand, eight hundred seventy-three".