43680569 has 2 divisors, whose sum is σ = 43680570. Its totient is φ = 43680568.

The previous prime is 43680547. The next prime is 43680617. The reversal of 43680569 is 96508634.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34070569 + 9610000 = 5837^2 + 3100^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43680569 is a prime.

It is a super-2 number, since 2×43680569² = 3815984216327522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43680269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21840284 + 21840285.

It is an arithmetic number, because the mean of its divisors is an integer number (21840285).

Almost surely, 2^43680569 is an apocalyptic number.

It is an amenable number.

43680569 is a deficient number, since it is larger than the sum of its proper divisors (1).

43680569 is an equidigital number, since it uses as much as digits as its factorization.

43680569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 43680569 is about 6609.1277034114. The cubic root of 43680569 is about 352.1784375305.

The spelling of 43680569 in words is "forty-three million, six hundred eighty thousand, five hundred sixty-nine".