43249697 has 2 divisors, whose sum is σ = 43249698. Its totient is φ = 43249696.

The previous prime is 43249691. The next prime is 43249699. The reversal of 43249697 is 79694234.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26635921 + 16613776 = 5161^2 + 4076^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43249697 is a prime.

Together with 43249699, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43249691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21624848 + 21624849.

It is an arithmetic number, because the mean of its divisors is an integer number (21624849).

Almost surely, 2^43249697 is an apocalyptic number.

It is an amenable number.

43249697 is a deficient number, since it is larger than the sum of its proper divisors (1).

43249697 is an equidigital number, since it uses as much as digits as its factorization.

43249697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 44.

The square root of 43249697 is about 6576.4501822792. The cubic root of 43249697 is about 351.0166278652.

The spelling of 43249697 in words is "forty-three million, two hundred forty-nine thousand, six hundred ninety-seven".