43990179749 has 16 divisors (see below), whose sum is σ = 45878382528. Its totient is φ = 42139481472.

The previous prime is 43990179719. The next prime is 43990179773. The reversal of 43990179749 is 94797109934.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 43990179749 - 2¹⁶ = 43990114213 is a prime.

It is a Smith number, since the sum of its digits (62) 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 = 43990179691 and 43990179700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43990179719) 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 15 ways as a sum of consecutive naturals, for example, 6112097 + ... + 6119289.

It is an arithmetic number, because the mean of its divisors is an integer number (2867398908).

Almost surely, 2^43990179749 is an apocalyptic number.

It is an amenable number.

43990179749 is a deficient number, since it is larger than the sum of its proper divisors (1888202779).

43990179749 is a wasteful number, since it uses less digits than its factorization.

43990179749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9764.

The product of its (nonzero) digits is 15431472, while the sum is 62.

The spelling of 43990179749 in words is "forty-three billion, nine hundred ninety million, one hundred seventy-nine thousand, seven hundred forty-nine".