43487393 has 2 divisors, whose sum is σ = 43487394. Its totient is φ = 43487392.

The previous prime is 43487383. The next prime is 43487399. The reversal of 43487393 is 39378434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28058209 + 15429184 = 5297^2 + 3928^2 .

It is a cyclic number.

It is not a de Polignac number, because 43487393 - 2¹⁴ = 43471009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43487393.

It is not a weakly prime, because it can be changed into another prime (43487399) 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, 21743696 + 21743697.

It is an arithmetic number, because the mean of its divisors is an integer number (21743697).

Almost surely, 2^43487393 is an apocalyptic number.

It is an amenable number.

43487393 is a deficient number, since it is larger than the sum of its proper divisors (1).

43487393 is an equidigital number, since it uses as much as digits as its factorization.

43487393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 41.

The square root of 43487393 is about 6594.4971756761. The cubic root of 43487393 is about 351.6585041368.

The spelling of 43487393 in words is "forty-three million, four hundred eighty-seven thousand, three hundred ninety-three".