43428037 has 2 divisors, whose sum is σ = 43428038. Its totient is φ = 43428036.

The previous prime is 43428001. The next prime is 43428079. The reversal of 43428037 is 73082434.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41912676 + 1515361 = 6474^2 + 1231^2 .

It is a cyclic number.

It is not a de Polignac number, because 43428037 - 2¹⁵ = 43395269 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43428097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21714018 + 21714019.

It is an arithmetic number, because the mean of its divisors is an integer number (21714019).

Almost surely, 2^43428037 is an apocalyptic number.

It is an amenable number.

43428037 is a deficient number, since it is larger than the sum of its proper divisors (1).

43428037 is an equidigital number, since it uses as much as digits as its factorization.

43428037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 43428037 is about 6589.9952200286. The cubic root of 43428037 is about 351.4984382381.

The spelling of 43428037 in words is "forty-three million, four hundred twenty-eight thousand, thirty-seven".