43454423 has 2 divisors, whose sum is σ = 43454424. Its totient is φ = 43454422.

The previous prime is 43454399. The next prime is 43454443. The reversal of 43454423 is 32445434.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43454423 - 2⁸ = 43454167 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 (43454443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21727211 + 21727212.

It is an arithmetic number, because the mean of its divisors is an integer number (21727212).

Almost surely, 2^43454423 is an apocalyptic number.

43454423 is a deficient number, since it is larger than the sum of its proper divisors (1).

43454423 is an equidigital number, since it uses as much as digits as its factorization.

43454423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 29.

The square root of 43454423 is about 6591.9968901692. The cubic root of 43454423 is about 351.5696116145.

Adding to 43454423 its reverse (32445434), we get a palindrome (75899857).

The spelling of 43454423 in words is "forty-three million, four hundred fifty-four thousand, four hundred twenty-three".