43534993 has 2 divisors, whose sum is σ = 43534994. Its totient is φ = 43534992.

The previous prime is 43534991. The next prime is 43535017. The reversal of 43534993 is 39943534.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26749584 + 16785409 = 5172^2 + 4097^2 .

It is a cyclic number.

It is not a de Polignac number, because 43534993 - 2¹ = 43534991 is a prime.

Together with 43534991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (43534991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21767496 + 21767497.

It is an arithmetic number, because the mean of its divisors is an integer number (21767497).

Almost surely, 2^43534993 is an apocalyptic number.

It is an amenable number.

43534993 is a deficient number, since it is larger than the sum of its proper divisors (1).

43534993 is an equidigital number, since it uses as much as digits as its factorization.

43534993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 40.

The square root of 43534993 is about 6598.1052583298. The cubic root of 43534993 is about 351.7867623134.

The spelling of 43534993 in words is "forty-three million, five hundred thirty-four thousand, nine hundred ninety-three".