43164749 has 2 divisors, whose sum is σ = 43164750. Its totient is φ = 43164748.

The previous prime is 43164661. The next prime is 43164773. The reversal of 43164749 is 94746134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41190724 + 1974025 = 6418^2 + 1405^2 .

It is a cyclic number.

It is not a de Polignac number, because 43164749 - 2²⁴ = 26387533 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43164049) 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, 21582374 + 21582375.

It is an arithmetic number, because the mean of its divisors is an integer number (21582375).

Almost surely, 2^43164749 is an apocalyptic number.

It is an amenable number.

43164749 is a deficient number, since it is larger than the sum of its proper divisors (1).

43164749 is an equidigital number, since it uses as much as digits as its factorization.

43164749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 38.

The square root of 43164749 is about 6569.9885083613. The cubic root of 43164749 is about 350.7866632169.

The spelling of 43164749 in words is "forty-three million, one hundred sixty-four thousand, seven hundred forty-nine".