43989949 has 2 divisors, whose sum is σ = 43989950. Its totient is φ = 43989948.

The previous prime is 43989943. The next prime is 43989983. The reversal of 43989949 is 94998934.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39816100 + 4173849 = 6310^2 + 2043^2 .

It is a cyclic number.

It is not a de Polignac number, because 43989949 - 2⁹ = 43989437 is a prime.

It is a super-2 number, since 2×43989949² = 3870231226045202, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 43989949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43989943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21994974 + 21994975.

It is an arithmetic number, because the mean of its divisors is an integer number (21994975).

Almost surely, 2^43989949 is an apocalyptic number.

It is an amenable number.

43989949 is a deficient number, since it is larger than the sum of its proper divisors (1).

43989949 is an equidigital number, since it uses as much as digits as its factorization.

43989949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2519424, while the sum is 55.

The square root of 43989949 is about 6632.4919148085. The cubic root of 43989949 is about 353.0079500225.

The spelling of 43989949 in words is "forty-three million, nine hundred eighty-nine thousand, nine hundred forty-nine".