43257913 has 2 divisors, whose sum is σ = 43257914. Its totient is φ = 43257912.

The previous prime is 43257901. The next prime is 43257919. The reversal of 43257913 is 31975234.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22024249 + 21233664 = 4693^2 + 4608^2 .

It is a cyclic number.

It is not a de Polignac number, because 43257913 - 2⁵ = 43257881 is a prime.

It is not a weakly prime, because it can be changed into another prime (43257919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21628956 + 21628957.

It is an arithmetic number, because the mean of its divisors is an integer number (21628957).

Almost surely, 2^43257913 is an apocalyptic number.

It is an amenable number.

43257913 is a deficient number, since it is larger than the sum of its proper divisors (1).

43257913 is an equidigital number, since it uses as much as digits as its factorization.

43257913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 34.

The square root of 43257913 is about 6577.0748057172. The cubic root of 43257913 is about 351.0388536087.

The spelling of 43257913 in words is "forty-three million, two hundred fifty-seven thousand, nine hundred thirteen".