43489949 has 2 divisors, whose sum is σ = 43489950. Its totient is φ = 43489948.

The previous prime is 43489909. The next prime is 43489967. The reversal of 43489949 is 94998434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27144100 + 16345849 = 5210^2 + 4043^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43489949 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 43489897 and 43489906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43489909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21744974 + 21744975.

It is an arithmetic number, because the mean of its divisors is an integer number (21744975).

Almost surely, 2^43489949 is an apocalyptic number.

It is an amenable number.

43489949 is a deficient number, since it is larger than the sum of its proper divisors (1).

43489949 is an equidigital number, since it uses as much as digits as its factorization.

43489949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1119744, while the sum is 50.

The square root of 43489949 is about 6594.6909707734. The cubic root of 43489949 is about 351.6653936548.

The spelling of 43489949 in words is "forty-three million, four hundred eighty-nine thousand, nine hundred forty-nine".