34731721439 has 4 divisors (see below), whose sum is σ = 34748413440. Its totient is φ = 34715029440.

The previous prime is 34731721433. The next prime is 34731721457. The reversal of 34731721439 is 93412713743.

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 34731721439 - 2⁸ = 34731721183 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 34731721439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34731721433) 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, 8342879 + ... + 8347040.

It is an arithmetic number, because the mean of its divisors is an integer number (8687103360).

Almost surely, 2^34731721439 is an apocalyptic number.

34731721439 is a deficient number, since it is larger than the sum of its proper divisors (16692001).

34731721439 is a wasteful number, since it uses less digits than its factorization.

34731721439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16692000.

The product of its digits is 381024, while the sum is 44.

The spelling of 34731721439 in words is "thirty-four billion, seven hundred thirty-one million, seven hundred twenty-one thousand, four hundred thirty-nine".