1003123213 has 4 divisors (see below), whose sum is σ = 1013055228. Its totient is φ = 993191200.

The previous prime is 1003123207. The next prime is 1003123229. The reversal of 1003123213 is 3123213001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3123213001 = 101 ⋅30922901.

It can be written as a sum of positive squares in 2 ways, for example, as 461304484 + 541818729 = 21478^2 + 23277^2 .

It is a cyclic number.

It is not a de Polignac number, because 1003123213 - 2²⁹ = 466252301 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 (1003123013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4965856 + ... + 4966057.

It is an arithmetic number, because the mean of its divisors is an integer number (253263807).

Almost surely, 2^1003123213 is an apocalyptic number.

It is an amenable number.

1003123213 is a deficient number, since it is larger than the sum of its proper divisors (9932015).

1003123213 is an equidigital number, since it uses as much as digits as its factorization.

1003123213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9932014.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1003123213 is about 31672.1204373815. The cubic root of 1003123213 is about 1001.0399890478.

Adding to 1003123213 its reverse (3123213001), we get a palindrome (4126336214).

The spelling of 1003123213 in words is "one billion, three million, one hundred twenty-three thousand, two hundred thirteen".