43240037 has 2 divisors, whose sum is σ = 43240038. Its totient is φ = 43240036.

The previous prime is 43240003. The next prime is 43240051. The reversal of 43240037 is 73004234.

It is a happy number.

43240037 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39363076 + 3876961 = 6274^2 + 1969^2 .

It is a cyclic number.

It is not a de Polignac number, because 43240037 - 2¹⁶ = 43174501 is a prime.

It is a super-2 number, since 2×43240037² = 3739401599522738, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 43239994 and 43240021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43240237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21620018 + 21620019.

It is an arithmetic number, because the mean of its divisors is an integer number (21620019).

Almost surely, 2^43240037 is an apocalyptic number.

It is an amenable number.

43240037 is a deficient number, since it is larger than the sum of its proper divisors (1).

43240037 is an equidigital number, since it uses as much as digits as its factorization.

43240037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 23.

The square root of 43240037 is about 6575.7157024920. The cubic root of 43240037 is about 350.9904922439.

The spelling of 43240037 in words is "forty-three million, two hundred forty thousand, thirty-seven".