43606669 has 2 divisors, whose sum is σ = 43606670. Its totient is φ = 43606668.

The previous prime is 43606627. The next prime is 43606679. The reversal of 43606669 is 96660634.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41088100 + 2518569 = 6410^2 + 1587^2 .

It is a cyclic number.

It is not a de Polignac number, because 43606669 - 2¹¹ = 43604621 is a prime.

It is a super-2 number, since 2×43606669² = 3803083162551122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43606679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21803334 + 21803335.

It is an arithmetic number, because the mean of its divisors is an integer number (21803335).

Almost surely, 2^43606669 is an apocalyptic number.

It is an amenable number.

43606669 is a deficient number, since it is larger than the sum of its proper divisors (1).

43606669 is an equidigital number, since it uses as much as digits as its factorization.

43606669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 40.

The square root of 43606669 is about 6603.5345838422. The cubic root of 43606669 is about 351.9797170002.

The spelling of 43606669 in words is "forty-three million, six hundred six thousand, six hundred sixty-nine".