43164661 has 2 divisors, whose sum is σ = 43164662. Its totient is φ = 43164660.

The previous prime is 43164601. The next prime is 43164749. The reversal of 43164661 is 16646134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32148900 + 11015761 = 5670^2 + 3319^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43164661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43164601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21582330 + 21582331.

It is an arithmetic number, because the mean of its divisors is an integer number (21582331).

Almost surely, 2^43164661 is an apocalyptic number.

It is an amenable number.

43164661 is a deficient number, since it is larger than the sum of its proper divisors (1).

43164661 is an equidigital number, since it uses as much as digits as its factorization.

43164661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 31.

The square root of 43164661 is about 6569.9818112381. The cubic root of 43164661 is about 350.7864248338.

The spelling of 43164661 in words is "forty-three million, one hundred sixty-four thousand, six hundred sixty-one".