1023313621373 has 2 divisors, whose sum is σ = 1023313621374. Its totient is φ = 1023313621372.

The previous prime is 1023313621367. The next prime is 1023313621417. The reversal of 1023313621373 is 3731263133201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 961582243609 + 61731377764 = 980603^2 + 248458^2 .

It is an emirp because it is prime and its reverse (3731263133201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1023313621373 - 2²⁸ = 1023045185917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1023313621303) 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, 511656810686 + 511656810687.

It is an arithmetic number, because the mean of its divisors is an integer number (511656810687).

Almost surely, 2^{1023313621373} is an apocalyptic number.

It is an amenable number.

1023313621373 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023313621373 is an equidigital number, since it uses as much as digits as its factorization.

1023313621373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 35.

Adding to 1023313621373 its reverse (3731263133201), we get a palindrome (4754576754574).

The spelling of 1023313621373 in words is "one trillion, twenty-three billion, three hundred thirteen million, six hundred twenty-one thousand, three hundred seventy-three".