39439439999 has 4 divisors (see below), whose sum is σ = 39579794160. Its totient is φ = 39299085840.

The previous prime is 39439439989. The next prime is 39439440043. The reversal of 39439439999 is 99993493493.

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 39439439999 - 2⁴ = 39439439983 is a prime.

It is a super-2 number, since 2×39439439999² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39439439909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70176659 + ... + 70177220.

It is an arithmetic number, because the mean of its divisors is an integer number (9894948540).

Almost surely, 2^39439439999 is an apocalyptic number.

39439439999 is a deficient number, since it is larger than the sum of its proper divisors (140354161).

39439439999 is a wasteful number, since it uses less digits than its factorization.

39439439999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140354160.

The product of its digits is 229582512, while the sum is 71.

The spelling of 39439439999 in words is "thirty-nine billion, four hundred thirty-nine million, four hundred thirty-nine thousand, nine hundred ninety-nine".