1001323403 has 2 divisors, whose sum is σ = 1001323404. Its totient is φ = 1001323402.

The previous prime is 1001323373. The next prime is 1001323417. The reversal of 1001323403 is 3043231001.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001323403 is a prime.

It is not a weakly prime, because it can be changed into another prime (1001323303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500661701 + 500661702.

It is an arithmetic number, because the mean of its divisors is an integer number (500661702).

Almost surely, 2^1001323403 is an apocalyptic number.

1001323403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001323403 is an equidigital number, since it uses as much as digits as its factorization.

1001323403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1001323403 is about 31643.6945219739. The cubic root of 1001323403 is about 1000.4409398768.

Adding to 1001323403 its reverse (3043231001), we get a palindrome (4044554404).

The spelling of 1001323403 in words is "one billion, one million, three hundred twenty-three thousand, four hundred three".