439998457979 has 4 divisors (see below), whose sum is σ = 440730569160. Its totient is φ = 439266346800.

The previous prime is 439998457973. The next prime is 439998457991. The reversal of 439998457979 is 979754899934.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 439998457979 - 2¹² = 439998453883 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 439998457897 and 439998457906.

It is not an unprimeable number, because it can be changed into a prime (439998457973) 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 3 ways as a sum of consecutive naturals, for example, 366054689 + ... + 366055890.

It is an arithmetic number, because the mean of its divisors is an integer number (110182642290).

Almost surely, 2^439998457979 is an apocalyptic number.

439998457979 is a deficient number, since it is larger than the sum of its proper divisors (732111181).

439998457979 is an equidigital number, since it uses as much as digits as its factorization.

439998457979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732111180.

The product of its digits is 5555329920, while the sum is 83.

The spelling of 439998457979 in words is "four hundred thirty-nine billion, nine hundred ninety-eight million, four hundred fifty-seven thousand, nine hundred seventy-nine".