43965149 has 2 divisors, whose sum is σ = 43965150. Its totient is φ = 43965148.

The previous prime is 43965127. The next prime is 43965151. The reversal of 43965149 is 94156934.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42055225 + 1909924 = 6485^2 + 1382^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43965149 is a prime.

Together with 43965151, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43961149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21982574 + 21982575.

It is an arithmetic number, because the mean of its divisors is an integer number (21982575).

Almost surely, 2^43965149 is an apocalyptic number.

It is an amenable number.

43965149 is a deficient number, since it is larger than the sum of its proper divisors (1).

43965149 is an equidigital number, since it uses as much as digits as its factorization.

43965149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 41.

The square root of 43965149 is about 6630.6220673478. The cubic root of 43965149 is about 352.9415996928.

The spelling of 43965149 in words is "forty-three million, nine hundred sixty-five thousand, one hundred forty-nine".