43597013 has 2 divisors, whose sum is σ = 43597014. Its totient is φ = 43597012.

The previous prime is 43597009. The next prime is 43597049. The reversal of 43597013 is 31079534.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43586404 + 10609 = 6602^2 + 103^2 .

It is a cyclic number.

It is not a de Polignac number, because 43597013 - 2² = 43597009 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_2638535 and since 43597013 and 2638535 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43597513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21798506 + 21798507.

It is an arithmetic number, because the mean of its divisors is an integer number (21798507).

Almost surely, 2^43597013 is an apocalyptic number.

It is an amenable number.

43597013 is a deficient number, since it is larger than the sum of its proper divisors (1).

43597013 is an equidigital number, since it uses as much as digits as its factorization.

43597013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 43597013 is about 6602.8034197604. The cubic root of 43597013 is about 351.9537349878.

The spelling of 43597013 in words is "forty-three million, five hundred ninety-seven thousand, thirteen".