43423613 has 2 divisors, whose sum is σ = 43423614. Its totient is φ = 43423612.

The previous prime is 43423603. The next prime is 43423619. The reversal of 43423613 is 31632434.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41242084 + 2181529 = 6422^2 + 1477^2 .

It is a cyclic number.

It is not a de Polignac number, because 43423613 - 2⁸ = 43423357 is a prime.

It is a super-2 number, since 2×43423613² = 3771220331947538, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43423619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21711806 + 21711807.

It is an arithmetic number, because the mean of its divisors is an integer number (21711807).

Almost surely, 2^43423613 is an apocalyptic number.

It is an amenable number.

43423613 is a deficient number, since it is larger than the sum of its proper divisors (1).

43423613 is an equidigital number, since it uses as much as digits as its factorization.

43423613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 26.

The square root of 43423613 is about 6589.6595511453. The cubic root of 43423613 is about 351.4865021556.

The spelling of 43423613 in words is "forty-three million, four hundred twenty-three thousand, six hundred thirteen".