43013893 has 18 divisors (see below), whose sum is σ = 49671986. Its totient is φ = 37020288.

The previous prime is 43013881. The next prime is 43013903. The reversal of 43013893 is 39831034.

It can be written as a sum of positive squares in 3 ways, for example, as 9628609 + 33385284 = 3103^2 + 5778^2 .

It is not a de Polignac number, because 43013893 - 2¹⁷ = 42882821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43013843) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 401946 + ... + 402052.

Almost surely, 2^43013893 is an apocalyptic number.

It is an amenable number.

43013893 is a deficient number, since it is larger than the sum of its proper divisors (6658093).

43013893 is a wasteful number, since it uses less digits than its factorization.

43013893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 43013893 is about 6558.4977700690. The cubic root of 43013893 is about 350.3775327583.

The spelling of 43013893 in words is "forty-three million, thirteen thousand, eight hundred ninety-three".