43628659 has 2 divisors, whose sum is σ = 43628660. Its totient is φ = 43628658.

The previous prime is 43628653. The next prime is 43628707. The reversal of 43628659 is 95682634.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43628659 is a prime.

It is a super-2 number, since 2×43628659² = 3806919772276562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43628653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21814329 + 21814330.

It is an arithmetic number, because the mean of its divisors is an integer number (21814330).

Almost surely, 2^43628659 is an apocalyptic number.

43628659 is a deficient number, since it is larger than the sum of its proper divisors (1).

43628659 is an equidigital number, since it uses as much as digits as its factorization.

43628659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 43.

The square root of 43628659 is about 6605.1993913886. The cubic root of 43628659 is about 352.0388725794.

The spelling of 43628659 in words is "forty-three million, six hundred twenty-eight thousand, six hundred fifty-nine".