43129423 has 2 divisors, whose sum is σ = 43129424. Its totient is φ = 43129422.

The previous prime is 43129403. The next prime is 43129433. The reversal of 43129423 is 32492134.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43129423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43129391 and 43129400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43129403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21564711 + 21564712.

It is an arithmetic number, because the mean of its divisors is an integer number (21564712).

Almost surely, 2^43129423 is an apocalyptic number.

43129423 is a deficient number, since it is larger than the sum of its proper divisors (1).

43129423 is an equidigital number, since it uses as much as digits as its factorization.

43129423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 28.

The square root of 43129423 is about 6567.2995211122. The cubic root of 43129423 is about 350.6909425807.

The spelling of 43129423 in words is "forty-three million, one hundred twenty-nine thousand, four hundred twenty-three".