43140289 has 2 divisors, whose sum is σ = 43140290. Its totient is φ = 43140288.

The previous prime is 43140283. The next prime is 43140311. The reversal of 43140289 is 98204134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38539264 + 4601025 = 6208^2 + 2145^2 .

It is a cyclic number.

It is not a de Polignac number, because 43140289 - 2³ = 43140281 is a prime.

It is a super-2 number, since 2×43140289² = 3722169070007042, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 43140289.

It is not a weakly prime, because it can be changed into another prime (43140281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21570144 + 21570145.

It is an arithmetic number, because the mean of its divisors is an integer number (21570145).

Almost surely, 2^43140289 is an apocalyptic number.

It is an amenable number.

43140289 is a deficient number, since it is larger than the sum of its proper divisors (1).

43140289 is an equidigital number, since it uses as much as digits as its factorization.

43140289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 43140289 is about 6568.1267496905. The cubic root of 43140289 is about 350.7203910604.

The spelling of 43140289 in words is "forty-three million, one hundred forty thousand, two hundred eighty-nine".