43281697 has 2 divisors, whose sum is σ = 43281698. Its totient is φ = 43281696.

The previous prime is 43281661. The next prime is 43281713. The reversal of 43281697 is 79618234.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42198016 + 1083681 = 6496^2 + 1041^2 .

It is a cyclic number.

It is not a de Polignac number, because 43281697 - 2¹⁵ = 43248929 is a prime.

It is not a weakly prime, because it can be changed into another prime (43281617) 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, 21640848 + 21640849.

It is an arithmetic number, because the mean of its divisors is an integer number (21640849).

Almost surely, 2^43281697 is an apocalyptic number.

It is an amenable number.

43281697 is a deficient number, since it is larger than the sum of its proper divisors (1).

43281697 is an equidigital number, since it uses as much as digits as its factorization.

43281697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 40.

The square root of 43281697 is about 6578.8826558923. The cubic root of 43281697 is about 351.1031777043.

The spelling of 43281697 in words is "forty-three million, two hundred eighty-one thousand, six hundred ninety-seven".