43423849 has 12 divisors (see below), whose sum is σ = 50621700. Its totient is φ = 37140768.

The previous prime is 43423837. The next prime is 43423867. The reversal of 43423849 is 94832434.

It can be written as a sum of positive squares in 2 ways, for example, as 22657600 + 20766249 = 4760^2 + 4557^2 .

It is not a de Polignac number, because 43423849 - 2⁹ = 43423337 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 (43423819) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40087 + ... + 41155.

It is an arithmetic number, because the mean of its divisors is an integer number (4218475).

Almost surely, 2^43423849 is an apocalyptic number.

43423849 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

43423849 is a deficient number, since it is larger than the sum of its proper divisors (7197851).

43423849 is a wasteful number, since it uses less digits than its factorization.

43423849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912 (or 1905 counting only the distinct ones).

The product of its digits is 82944, while the sum is 37.

The square root of 43423849 is about 6589.6774579641. The cubic root of 43423849 is about 351.4871389111.

The spelling of 43423849 in words is "forty-three million, four hundred twenty-three thousand, eight hundred forty-nine".