1001323501 has 2 divisors, whose sum is σ = 1001323502. Its totient is φ = 1001323500.

The previous prime is 1001323487. The next prime is 1001323517. The reversal of 1001323501 is 1053231001.

It is an a-pointer prime, because the next prime (1001323517) can be obtained adding 1001323501 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 666982276 + 334341225 = 25826^2 + 18285^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001323501 - 2⁷ = 1001323373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001323201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500661750 + 500661751.

It is an arithmetic number, because the mean of its divisors is an integer number (500661751).

Almost surely, 2^1001323501 is an apocalyptic number.

It is an amenable number.

1001323501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001323501 is an equidigital number, since it uses as much as digits as its factorization.

1001323501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 1001323501 is about 31643.6960704656. The cubic root of 1001323501 is about 1000.4409725147.

Adding to 1001323501 its reverse (1053231001), we get a palindrome (2054554502).

The spelling of 1001323501 in words is "one billion, one million, three hundred twenty-three thousand, five hundred one".