43253691 has 12 divisors (see below), whose sum is σ = 62449848. Its totient is φ = 26617344.

The previous prime is 43253689. The next prime is 43253701. The reversal of 43253691 is 19635234.

It is not a de Polignac number, because 43253691 - 2¹ = 43253689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43253611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42150 + ... + 43163.

It is an arithmetic number, because the mean of its divisors is an integer number (5204154).

Almost surely, 2^43253691 is an apocalyptic number.

43253691 is a deficient number, since it is larger than the sum of its proper divisors (19196157).

43253691 is a wasteful number, since it uses less digits than its factorization.

43253691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85342 (or 85329 counting only the distinct ones).

The product of its digits is 19440, while the sum is 33.

The square root of 43253691 is about 6576.7538345296. The cubic root of 43253691 is about 351.0274326982.

The spelling of 43253691 in words is "forty-three million, two hundred fifty-three thousand, six hundred ninety-one".