43997747 has 2 divisors, whose sum is σ = 43997748. Its totient is φ = 43997746.

The previous prime is 43997713. The next prime is 43997803. The reversal of 43997747 is 74779934.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43997747 - 2⁸ = 43997491 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43997695 and 43997704.

It is not a weakly prime, because it can be changed into another prime (43997347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21998873 + 21998874.

It is an arithmetic number, because the mean of its divisors is an integer number (21998874).

Almost surely, 2^43997747 is an apocalyptic number.

43997747 is a deficient number, since it is larger than the sum of its proper divisors (1).

43997747 is an equidigital number, since it uses as much as digits as its factorization.

43997747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1333584, while the sum is 50.

The square root of 43997747 is about 6633.0797522719. The cubic root of 43997747 is about 353.0288077670.

It can be divided in two parts, 43997 and 747, that added together give a palindrome (44744).

The spelling of 43997747 in words is "forty-three million, nine hundred ninety-seven thousand, seven hundred forty-seven".