43680971 has 2 divisors, whose sum is σ = 43680972. Its totient is φ = 43680970.

The previous prime is 43680947. The next prime is 43680983. The reversal of 43680971 is 17908634.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43680971 - 2¹⁰ = 43679947 is a prime.

It is not a weakly prime, because it can be changed into another prime (43680671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21840485 + 21840486.

It is an arithmetic number, because the mean of its divisors is an integer number (21840486).

Almost surely, 2^43680971 is an apocalyptic number.

43680971 is a deficient number, since it is larger than the sum of its proper divisors (1).

43680971 is an equidigital number, since it uses as much as digits as its factorization.

43680971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 43680971 is about 6609.1581158269. The cubic root of 43680971 is about 352.1795179140.

The spelling of 43680971 in words is "forty-three million, six hundred eighty thousand, nine hundred seventy-one".