1003221399 has 8 divisors (see below), whose sum is σ = 1340965872. Its totient is φ = 667145600.

The previous prime is 1003221397. The next prime is 1003221403. The reversal of 1003221399 is 9931223001.

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 1003221399 - 2¹ = 1003221397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1003221397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 415764 + ... + 418169.

It is an arithmetic number, because the mean of its divisors is an integer number (167620734).

Almost surely, 2^1003221399 is an apocalyptic number.

1003221399 is a deficient number, since it is larger than the sum of its proper divisors (337744473).

1003221399 is an equidigital number, since it uses as much as digits as its factorization.

1003221399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834337.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 1003221399 is about 31673.6704377627. The cubic root of 1003221399 is about 1001.0726486801.

The spelling of 1003221399 in words is "one billion, three million, two hundred twenty-one thousand, three hundred ninety-nine".