43680342739 has 4 divisors (see below), whose sum is σ = 47651283000. Its totient is φ = 39709402480.

The previous prime is 43680342737. The next prime is 43680342763. The reversal of 43680342739 is 93724308634.

It is a happy number.

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

It is not a de Polignac number, because 43680342739 - 2¹ = 43680342737 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43680342692 and 43680342701.

It is not an unprimeable number, because it can be changed into a prime (43680342731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1985470114 + ... + 1985470135.

It is an arithmetic number, because the mean of its divisors is an integer number (11912820750).

Almost surely, 2^43680342739 is an apocalyptic number.

43680342739 is a deficient number, since it is larger than the sum of its proper divisors (3970940261).

43680342739 is a wasteful number, since it uses less digits than its factorization.

43680342739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3970940260.

The product of its (nonzero) digits is 2612736, while the sum is 49.

The spelling of 43680342739 in words is "forty-three billion, six hundred eighty million, three hundred forty-two thousand, seven hundred thirty-nine".