43972073 has 2 divisors, whose sum is σ = 43972074. Its totient is φ = 43972072.

The previous prime is 43972069. The next prime is 43972079. The reversal of 43972073 is 37027934.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36638809 + 7333264 = 6053^2 + 2708^2 .

It is a cyclic number.

It is not a de Polignac number, because 43972073 - 2² = 43972069 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (43972079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21986036 + 21986037.

It is an arithmetic number, because the mean of its divisors is an integer number (21986037).

Almost surely, 2^43972073 is an apocalyptic number.

It is an amenable number.

43972073 is a deficient number, since it is larger than the sum of its proper divisors (1).

43972073 is an equidigital number, since it uses as much as digits as its factorization.

43972073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 35.

The square root of 43972073 is about 6631.1441697493. The cubic root of 43972073 is about 352.9601267870.

The spelling of 43972073 in words is "forty-three million, nine hundred seventy-two thousand, seventy-three".