43090649 has 6 divisors (see below), whose sum is σ = 50125914. Its totient is φ = 36934800.

The previous prime is 43090639. The next prime is 43090657. The reversal of 43090649 is 94609034.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 39778249 + 3312400 = 6307^2 + 1820^2 .

It is a de Polignac number, because none of the positive numbers 2^k-43090649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43090639) 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 in 5 ways as a sum of consecutive naturals, for example, 439652 + ... + 439749.

It is an arithmetic number, because the mean of its divisors is an integer number (8354319).

Almost surely, 2^43090649 is an apocalyptic number.

43090649 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

43090649 is a deficient number, since it is larger than the sum of its proper divisors (7035265).

43090649 is an equidigital number, since it uses as much as digits as its factorization.

43090649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879415 (or 879408 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 43090649 is about 6564.3468068042. The cubic root of 43090649 is about 350.5858189278.

The spelling of 43090649 in words is "forty-three million, ninety thousand, six hundred forty-nine".