43794431689 has 4 divisors (see below), whose sum is σ = 43807266756. Its totient is φ = 43781596624.

The previous prime is 43794431687. The next prime is 43794431701. The reversal of 43794431689 is 98613449734.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98613449734 = 2 ⋅49306724867.

It can be written as a sum of positive squares in 2 ways, for example, as 32008072464 + 11786359225 = 178908^2 + 108565^2 .

It is a cyclic number.

It is not a de Polignac number, because 43794431689 - 2¹ = 43794431687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43794431687) 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, 6412414 + ... + 6419239.

It is an arithmetic number, because the mean of its divisors is an integer number (10951816689).

Almost surely, 2^43794431689 is an apocalyptic number.

It is an amenable number.

43794431689 is a deficient number, since it is larger than the sum of its proper divisors (12835067).

43794431689 is a wasteful number, since it uses less digits than its factorization.

43794431689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12835066.

The product of its digits is 15676416, while the sum is 58.

The spelling of 43794431689 in words is "forty-three billion, seven hundred ninety-four million, four hundred thirty-one thousand, six hundred eighty-nine".