439630973 has 2 divisors, whose sum is σ = 439630974. Its totient is φ = 439630972.

The previous prime is 439630969. The next prime is 439630979. The reversal of 439630973 is 379036934.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 313360804 + 126270169 = 17702^2 + 11237^2 .

It is a cyclic number.

It is not a de Polignac number, because 439630973 - 2² = 439630969 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (439630979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219815486 + 219815487.

It is an arithmetic number, because the mean of its divisors is an integer number (219815487).

Almost surely, 2^439630973 is an apocalyptic number.

It is an amenable number.

439630973 is a deficient number, since it is larger than the sum of its proper divisors (1).

439630973 is an equidigital number, since it uses as much as digits as its factorization.

439630973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 367416, while the sum is 44.

The square root of 439630973 is about 20967.3787822894. The cubic root of 439630973 is about 760.3777975066.

The spelling of 439630973 in words is "four hundred thirty-nine million, six hundred thirty thousand, nine hundred seventy-three".