43998697 has 4 divisors (see below), whose sum is σ = 44388180. Its totient is φ = 43609216.

The previous prime is 43998683. The next prime is 43998733. The reversal of 43998697 is 79689934.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11861136 + 32137561 = 3444^2 + 5669^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43998697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43998637) 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 3 ways as a sum of consecutive naturals, for example, 194572 + ... + 194797.

It is an arithmetic number, because the mean of its divisors is an integer number (11097045).

Almost surely, 2^43998697 is an apocalyptic number.

It is an amenable number.

43998697 is a deficient number, since it is larger than the sum of its proper divisors (389483).

43998697 is a wasteful number, since it uses less digits than its factorization.

43998697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389482.

The product of its digits is 2939328, while the sum is 55.

The square root of 43998697 is about 6633.1513626631. The cubic root of 43998697 is about 353.0313486165.

The spelling of 43998697 in words is "forty-three million, nine hundred ninety-eight thousand, six hundred ninety-seven".