43997375 has 16 divisors (see below), whose sum is σ = 55095456. Its totient is φ = 35078400.

The previous prime is 43997353. The next prime is 43997419. The reversal of 43997375 is 57379934.

It is a happy number.

It is not a de Polignac number, because 43997375 - 2⁸ = 43997119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65039 + ... + 65711.

It is an arithmetic number, because the mean of its divisors is an integer number (3443466).

Almost surely, 2^43997375 is an apocalyptic number.

43997375 is a deficient number, since it is larger than the sum of its proper divisors (11098081).

43997375 is an equidigital number, since it uses as much as digits as its factorization.

43997375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1211 (or 1201 counting only the distinct ones).

The product of its digits is 714420, while the sum is 47.

The square root of 43997375 is about 6633.0517109397. The cubic root of 43997375 is about 353.0278128139.

The spelling of 43997375 in words is "forty-three million, nine hundred ninety-seven thousand, three hundred seventy-five".