43323913 has 2 divisors, whose sum is σ = 43323914. Its totient is φ = 43323912.

The previous prime is 43323911. The next prime is 43323953. The reversal of 43323913 is 31932334.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29463184 + 13860729 = 5428^2 + 3723^2 .

It is a cyclic number.

It is not a de Polignac number, because 43323913 - 2¹ = 43323911 is a prime.

It is a super-2 number, since 2×43323913² = 3753922875263138, which contains 22 as substring.

Together with 43323911, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (43323911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21661956 + 21661957.

It is an arithmetic number, because the mean of its divisors is an integer number (21661957).

Almost surely, 2^43323913 is an apocalyptic number.

It is an amenable number.

43323913 is a deficient number, since it is larger than the sum of its proper divisors (1).

43323913 is an equidigital number, since it uses as much as digits as its factorization.

43323913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 28.

The square root of 43323913 is about 6582.0903214708. The cubic root of 43323913 is about 351.2172933414.

The spelling of 43323913 in words is "forty-three million, three hundred twenty-three thousand, nine hundred thirteen".