1023320401 has 2 divisors, whose sum is σ = 1023320402. Its totient is φ = 1023320400.

The previous prime is 1023320381. The next prime is 1023320443. The reversal of 1023320401 is 1040233201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 634284225 + 389036176 = 25185^2 + 19724^2 .

It is a cyclic number.

It is not a de Polignac number, because 1023320401 - 2¹⁷ = 1023189329 is a prime.

It is not a weakly prime, because it can be changed into another prime (1023320461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511660200 + 511660201.

It is an arithmetic number, because the mean of its divisors is an integer number (511660201).

Almost surely, 2^1023320401 is an apocalyptic number.

It is an amenable number.

1023320401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023320401 is an equidigital number, since it uses as much as digits as its factorization.

1023320401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1023320401 is about 31989.3795032039. The cubic root of 1023320401 is about 1007.7138111200.

Adding to 1023320401 its reverse (1040233201), we get a palindrome (2063553602).

The spelling of 1023320401 in words is "one billion, twenty-three million, three hundred twenty thousand, four hundred one".