439638481 has 2 divisors, whose sum is σ = 439638482. Its totient is φ = 439638480.

The previous prime is 439638469. The next prime is 439638509. The reversal of 439638481 is 184836934.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 254243025 + 185395456 = 15945^2 + 13616^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-439638481 is a prime.

It is a super-2 number, since 2×439638481² = 386563987951974722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (439638401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219819240 + 219819241.

It is an arithmetic number, because the mean of its divisors is an integer number (219819241).

Almost surely, 2^439638481 is an apocalyptic number.

It is an amenable number.

439638481 is a deficient number, since it is larger than the sum of its proper divisors (1).

439638481 is an equidigital number, since it uses as much as digits as its factorization.

439638481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 46.

The square root of 439638481 is about 20967.5578215490. The cubic root of 439638481 is about 760.3821260491.

The spelling of 439638481 in words is "four hundred thirty-nine million, six hundred thirty-eight thousand, four hundred eighty-one".