43240693 has 4 divisors (see below), whose sum is σ = 43623468. Its totient is φ = 42857920.

The previous prime is 43240669. The next prime is 43240697. The reversal of 43240693 is 39604234.

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 4028049 + 39212644 = 2007^2 + 6262^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43240693 is a prime.

It is a super-2 number, since 2×43240693² = 3739515062240498, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43240697) 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, 191218 + ... + 191443.

It is an arithmetic number, because the mean of its divisors is an integer number (10905867).

Almost surely, 2^43240693 is an apocalyptic number.

It is an amenable number.

43240693 is a deficient number, since it is larger than the sum of its proper divisors (382775).

43240693 is a wasteful number, since it uses less digits than its factorization.

43240693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382774.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 43240693 is about 6575.7655828048. The cubic root of 43240693 is about 350.9922672084.

The spelling of 43240693 in words is "forty-three million, two hundred forty thousand, six hundred ninety-three".