43500913 has 2 divisors, whose sum is σ = 43500914. Its totient is φ = 43500912.

The previous prime is 43500893. The next prime is 43500923. The reversal of 43500913 is 31900534.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39841344 + 3659569 = 6312^2 + 1913^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43500913 is a prime.

It is not a weakly prime, because it can be changed into another prime (43500923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21750456 + 21750457.

It is an arithmetic number, because the mean of its divisors is an integer number (21750457).

Almost surely, 2^43500913 is an apocalyptic number.

It is an amenable number.

43500913 is a deficient number, since it is larger than the sum of its proper divisors (1).

43500913 is an equidigital number, since it uses as much as digits as its factorization.

43500913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 43500913 is about 6595.5221931247. The cubic root of 43500913 is about 351.6949432826.

The spelling of 43500913 in words is "forty-three million, five hundred thousand, nine hundred thirteen".