43042019 has 2 divisors, whose sum is σ = 43042020. Its totient is φ = 43042018.

The previous prime is 43042009. The next prime is 43042031. The reversal of 43042019 is 91024034.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43042019 - 2¹² = 43037923 is a prime.

It is a super-2 number, since 2×43042019² = 3705230799192722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43041985 and 43042003.

It is not a weakly prime, because it can be changed into another prime (43042009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21521009 + 21521010.

It is an arithmetic number, because the mean of its divisors is an integer number (21521010).

Almost surely, 2^43042019 is an apocalyptic number.

43042019 is a deficient number, since it is larger than the sum of its proper divisors (1).

43042019 is an equidigital number, since it uses as much as digits as its factorization.

43042019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 43042019 is about 6560.6416606914. The cubic root of 43042019 is about 350.4538846114.

The spelling of 43042019 in words is "forty-three million, forty-two thousand, nineteen".