43020073 has 2 divisors, whose sum is σ = 43020074. Its totient is φ = 43020072.

The previous prime is 43020071. The next prime is 43020077. The reversal of 43020073 is 37002034.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39790864 + 3229209 = 6308^2 + 1797^2 .

It is a cyclic number.

It is not a de Polignac number, because 43020073 - 2¹ = 43020071 is a prime.

Together with 43020071, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 43020073.

It is not a weakly prime, because it can be changed into another prime (43020071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21510036 + 21510037.

It is an arithmetic number, because the mean of its divisors is an integer number (21510037).

Almost surely, 2^43020073 is an apocalyptic number.

It is an amenable number.

43020073 is a deficient number, since it is larger than the sum of its proper divisors (1).

43020073 is an equidigital number, since it uses as much as digits as its factorization.

43020073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 19.

The square root of 43020073 is about 6558.9688976241. The cubic root of 43020073 is about 350.3943120615.

It can be divided in two parts, 430 and 20073, that added together give a triangular number (20503 = T₂₀₂).

The spelling of 43020073 in words is "forty-three million, twenty thousand, seventy-three".