100391443 has 8 divisors (see below), whose sum is σ = 106399440. Its totient is φ = 94394880.

The previous prime is 100391441. The next prime is 100391449. The reversal of 100391443 is 344193001.

It is a happy number.

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

It is not a de Polignac number, because 100391443 - 2¹ = 100391441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100391441) 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, 20968 + ... + 25306.

It is an arithmetic number, because the mean of its divisors is an integer number (13299930).

Almost surely, 2^100391443 is an apocalyptic number.

100391443 is a deficient number, since it is larger than the sum of its proper divisors (6007997).

100391443 is a wasteful number, since it uses less digits than its factorization.

100391443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5717.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 100391443 is about 10019.5530339432. The cubic root of 100391443 is about 464.7637339839.

The spelling of 100391443 in words is "one hundred million, three hundred ninety-one thousand, four hundred forty-three".