43012649 has 4 divisors (see below), whose sum is σ = 44061780. Its totient is φ = 41963520.

The previous prime is 43012643. The next prime is 43012663. The reversal of 43012649 is 94621034.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15523600 + 27489049 = 3940^2 + 5243^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43012649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43012643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 524504 + ... + 524585.

It is an arithmetic number, because the mean of its divisors is an integer number (11015445).

Almost surely, 2^43012649 is an apocalyptic number.

It is an amenable number.

43012649 is a deficient number, since it is larger than the sum of its proper divisors (1049131).

43012649 is a wasteful number, since it uses less digits than its factorization.

43012649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049130.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 43012649 is about 6558.4029305922. The cubic root of 43012649 is about 350.3741549825.

The spelling of 43012649 in words is "forty-three million, twelve thousand, six hundred forty-nine".