43072013 has 2 divisors, whose sum is σ = 43072014. Its totient is φ = 43072012.

The previous prime is 43071997. The next prime is 43072019. The reversal of 43072013 is 31027034.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41822089 + 1249924 = 6467^2 + 1118^2 .

It is a cyclic number.

It is not a de Polignac number, because 43072013 - 2⁴ = 43071997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43072019) 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, 21536006 + 21536007.

It is an arithmetic number, because the mean of its divisors is an integer number (21536007).

Almost surely, 2^43072013 is an apocalyptic number.

It is an amenable number.

43072013 is a deficient number, since it is larger than the sum of its proper divisors (1).

43072013 is an equidigital number, since it uses as much as digits as its factorization.

43072013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 43072013 is about 6562.9271670498. The cubic root of 43072013 is about 350.5352707649.

Adding to 43072013 its reverse (31027034), we get a palindrome (74099047).

The spelling of 43072013 in words is "forty-three million, seventy-two thousand, thirteen".