43990011111 has 4 divisors (see below), whose sum is σ = 58653348152. Its totient is φ = 29326674072.

The previous prime is 43990011097. The next prime is 43990011113. The reversal of 43990011111 is 11111009934.

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 43990011111 - 2¹⁸ = 43989748967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43990011113) 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, 7331668516 + ... + 7331668521.

It is an arithmetic number, because the mean of its divisors is an integer number (14663337038).

Almost surely, 2^43990011111 is an apocalyptic number.

43990011111 is a deficient number, since it is larger than the sum of its proper divisors (14663337041).

43990011111 is a wasteful number, since it uses less digits than its factorization.

43990011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14663337040.

The product of its (nonzero) digits is 972, while the sum is 30.

The spelling of 43990011111 in words is "forty-three billion, nine hundred ninety million, eleven thousand, one hundred eleven".