439889442491 has 8 divisors (see below), whose sum is σ = 443117874144. Its totient is φ = 436661265600.

The previous prime is 439889442479. The next prime is 439889442493. The reversal of 439889442491 is 194244988934.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-439889442491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (439889442493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4706666 + ... + 4799216.

It is an arithmetic number, because the mean of its divisors is an integer number (55389734268).

Almost surely, 2^439889442491 is an apocalyptic number.

439889442491 is a deficient number, since it is larger than the sum of its proper divisors (3228431653).

439889442491 is a wasteful number, since it uses less digits than its factorization.

439889442491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127381.

The product of its digits is 71663616, while the sum is 65.

The spelling of 439889442491 in words is "four hundred thirty-nine billion, eight hundred eighty-nine million, four hundred forty-two thousand, four hundred ninety-one".