43097939 has 2 divisors, whose sum is σ = 43097940. Its totient is φ = 43097938.

The previous prime is 43097927. The next prime is 43097953. The reversal of 43097939 is 93979034.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43097939 - 2¹⁶ = 43032403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43097939.

It is not a weakly prime, because it can be changed into another prime (43097969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21548969 + 21548970.

It is an arithmetic number, because the mean of its divisors is an integer number (21548970).

Almost surely, 2^43097939 is an apocalyptic number.

43097939 is a deficient number, since it is larger than the sum of its proper divisors (1).

43097939 is an equidigital number, since it uses as much as digits as its factorization.

43097939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 183708, while the sum is 44.

The square root of 43097939 is about 6564.9020556289. The cubic root of 43097939 is about 350.6055883098.

The spelling of 43097939 in words is "forty-three million, ninety-seven thousand, nine hundred thirty-nine".