43425913 has 2 divisors, whose sum is σ = 43425914. Its totient is φ = 43425912.

The previous prime is 43425911. The next prime is 43425923. The reversal of 43425913 is 31952434.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35200489 + 8225424 = 5933^2 + 2868^2 .

It is a cyclic number.

It is not a de Polignac number, because 43425913 - 2¹ = 43425911 is a prime.

Together with 43425911, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (43425911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21712956 + 21712957.

It is an arithmetic number, because the mean of its divisors is an integer number (21712957).

Almost surely, 2^43425913 is an apocalyptic number.

It is an amenable number.

43425913 is a deficient number, since it is larger than the sum of its proper divisors (1).

43425913 is an equidigital number, since it uses as much as digits as its factorization.

43425913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 31.

The square root of 43425913 is about 6589.8340646787. The cubic root of 43425913 is about 351.4927077247.

The spelling of 43425913 in words is "forty-three million, four hundred twenty-five thousand, nine hundred thirteen".