43400429 has 2 divisors, whose sum is σ = 43400430. Its totient is φ = 43400428.

The previous prime is 43400417. The next prime is 43400447. The reversal of 43400429 is 92400434.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26574025 + 16826404 = 5155^2 + 4102^2 .

It is a cyclic number.

It is not a de Polignac number, because 43400429 - 2²⁰ = 42351853 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 43400398 and 43400407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43400449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21700214 + 21700215.

It is an arithmetic number, because the mean of its divisors is an integer number (21700215).

Almost surely, 2^43400429 is an apocalyptic number.

It is an amenable number.

43400429 is a deficient number, since it is larger than the sum of its proper divisors (1).

43400429 is an equidigital number, since it uses as much as digits as its factorization.

43400429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 43400429 is about 6587.9001965725. The cubic root of 43400429 is about 351.4239377798.

The spelling of 43400429 in words is "forty-three million, four hundred thousand, four hundred twenty-nine".