10043991 has 12 divisors (see below), whose sum is σ = 15361632. Its totient is φ = 6302016.

The previous prime is 10043959. The next prime is 10043993. The reversal of 10043991 is 19934001.

It is not a de Polignac number, because 10043991 - 2⁵ = 10043959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10043993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32671 + ... + 32976.

It is an arithmetic number, because the mean of its divisors is an integer number (1280136).

Almost surely, 2^10043991 is an apocalyptic number.

10043991 is a deficient number, since it is larger than the sum of its proper divisors (5317641).

10043991 is a wasteful number, since it uses less digits than its factorization.

10043991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65670 (or 65667 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 10043991 is about 3169.2256151937. The cubic root of 10043991 is about 215.7589260003.

Adding to 10043991 its reverse (19934001), we get a palindrome (29977992).

The spelling of 10043991 in words is "ten million, forty-three thousand, nine hundred ninety-one".