440103421 has 4 divisors (see below), whose sum is σ = 442025500. Its totient is φ = 438181344.

The previous prime is 440103401. The next prime is 440103437. The reversal of 440103421 is 124301044.

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 338376025 + 101727396 = 18395^2 + 10086^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-440103421 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 (440103401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 960696 + ... + 961153.

It is an arithmetic number, because the mean of its divisors is an integer number (110506375).

Almost surely, 2^440103421 is an apocalyptic number.

It is an amenable number.

440103421 is a deficient number, since it is larger than the sum of its proper divisors (1922079).

440103421 is a wasteful number, since it uses less digits than its factorization.

440103421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1922078.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 440103421 is about 20978.6420199211. The cubic root of 440103421 is about 760.6500791728.

Adding to 440103421 its reverse (124301044), we get a palindrome (564404465).

The spelling of 440103421 in words is "four hundred forty million, one hundred three thousand, four hundred twenty-one".