43685423 has 2 divisors, whose sum is σ = 43685424. Its totient is φ = 43685422.

The previous prime is 43685413. The next prime is 43685431. The reversal of 43685423 is 32458634.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43685423 - 2⁸ = 43685167 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43685413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21842711 + 21842712.

It is an arithmetic number, because the mean of its divisors is an integer number (21842712).

Almost surely, 2^43685423 is an apocalyptic number.

43685423 is a deficient number, since it is larger than the sum of its proper divisors (1).

43685423 is an equidigital number, since it uses as much as digits as its factorization.

43685423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 35.

The square root of 43685423 is about 6609.4949126238. The cubic root of 43685423 is about 352.1914823149.

The spelling of 43685423 in words is "forty-three million, six hundred eighty-five thousand, four hundred twenty-three".