43240429 has 2 divisors, whose sum is σ = 43240430. Its totient is φ = 43240428.

The previous prime is 43240411. The next prime is 43240433. The reversal of 43240429 is 92404234.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43204329 + 36100 = 6573^2 + 190^2 .

It is a cyclic number.

It is not a de Polignac number, because 43240429 - 2⁵ = 43240397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43240397 and 43240406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43240459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21620214 + 21620215.

It is an arithmetic number, because the mean of its divisors is an integer number (21620215).

Almost surely, 2^43240429 is an apocalyptic number.

It is an amenable number.

43240429 is a deficient number, since it is larger than the sum of its proper divisors (1).

43240429 is an equidigital number, since it uses as much as digits as its factorization.

43240429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 43240429 is about 6575.7455090659. The cubic root of 43240429 is about 350.9915528956.

The spelling of 43240429 in words is "forty-three million, two hundred forty thousand, four hundred twenty-nine".