439639997 has 4 divisors (see below), whose sum is σ = 446201856. Its totient is φ = 433078140.

The previous prime is 439639979. The next prime is 439639999. The reversal of 439639997 is 799936934.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 439639997 - 2¹⁰ = 439638973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (439639999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3280829 + ... + 3280962.

It is an arithmetic number, because the mean of its divisors is an integer number (111550464).

Almost surely, 2^439639997 is an apocalyptic number.

It is an amenable number.

439639997 is a deficient number, since it is larger than the sum of its proper divisors (6561859).

439639997 is an equidigital number, since it uses as much as digits as its factorization.

439639997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6561858.

The product of its digits is 9920232, while the sum is 59.

The square root of 439639997 is about 20967.5939726045. The cubic root of 439639997 is about 760.3830000536.

The spelling of 439639997 in words is "four hundred thirty-nine million, six hundred thirty-nine thousand, nine hundred ninety-seven".