43672513 has 2 divisors, whose sum is σ = 43672514. Its totient is φ = 43672512.

The previous prime is 43672487. The next prime is 43672537. The reversal of 43672513 is 31527634.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33097009 + 10575504 = 5753^2 + 3252^2 .

It is a cyclic number.

It is not a de Polignac number, because 43672513 - 2⁹ = 43672001 is a prime.

It is not a weakly prime, because it can be changed into another prime (43672613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21836256 + 21836257.

It is an arithmetic number, because the mean of its divisors is an integer number (21836257).

Almost surely, 2^43672513 is an apocalyptic number.

It is an amenable number.

43672513 is a deficient number, since it is larger than the sum of its proper divisors (1).

43672513 is an equidigital number, since it uses as much as digits as its factorization.

43672513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 31.

The square root of 43672513 is about 6608.5182151523. The cubic root of 43672513 is about 352.1567854626.

The spelling of 43672513 in words is "forty-three million, six hundred seventy-two thousand, five hundred thirteen".