43997407 has 8 divisors (see below), whose sum is σ = 46402160. Its totient is φ = 41601600.

The previous prime is 43997353. The next prime is 43997419. The reversal of 43997407 is 70479934.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 43997407 - 2¹⁹ = 43473119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43997467) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9493 + ... + 13345.

It is an arithmetic number, because the mean of its divisors is an integer number (5800270).

Almost surely, 2^43997407 is an apocalyptic number.

43997407 is a deficient number, since it is larger than the sum of its proper divisors (2404753).

43997407 is a wasteful number, since it uses less digits than its factorization.

43997407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4473.

The product of its (nonzero) digits is 190512, while the sum is 43.

The square root of 43997407 is about 6633.0541231020. The cubic root of 43997407 is about 353.0278984015.

The spelling of 43997407 in words is "forty-three million, nine hundred ninety-seven thousand, four hundred seven".