43680513 has 4 divisors (see below), whose sum is σ = 58240688. Its totient is φ = 29120340.

The previous prime is 43680479. The next prime is 43680521. The reversal of 43680513 is 31508634.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 43680513 - 2⁸ = 43680257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43680113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7280083 + ... + 7280088.

It is an arithmetic number, because the mean of its divisors is an integer number (14560172).

Almost surely, 2^43680513 is an apocalyptic number.

It is an amenable number.

43680513 is a deficient number, since it is larger than the sum of its proper divisors (14560175).

43680513 is a wasteful number, since it uses less digits than its factorization.

43680513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14560174.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 43680513 is about 6609.1234668449. The cubic root of 43680513 is about 352.1782870288.

The spelling of 43680513 in words is "forty-three million, six hundred eighty thousand, five hundred thirteen".