39670439689 has 4 divisors (see below), whose sum is σ = 39675946756. Its totient is φ = 39664932624.

The previous prime is 39670439651. The next prime is 39670439729. The reversal of 39670439689 is 98693407693.

39670439689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 27054657289 + 12615782400 = 164483^2 + 112320^2 .

It is a cyclic number.

It is not a de Polignac number, because 39670439689 - 2⁷ = 39670439561 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 39670439689.

It is not an unprimeable number, because it can be changed into a prime (39670439189) 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, 2742714 + ... + 2757139.

It is an arithmetic number, because the mean of its divisors is an integer number (9918986689).

Almost surely, 2^39670439689 is an apocalyptic number.

It is an amenable number.

39670439689 is a deficient number, since it is larger than the sum of its proper divisors (5507067).

39670439689 is an equidigital number, since it uses as much as digits as its factorization.

39670439689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5507066.

The product of its (nonzero) digits is 52907904, while the sum is 64.

The spelling of 39670439689 in words is "thirty-nine billion, six hundred seventy million, four hundred thirty-nine thousand, six hundred eighty-nine".