1321403023 has 2 divisors, whose sum is σ = 1321403024. Its totient is φ = 1321403022.

The previous prime is 1321402933. The next prime is 1321403033. The reversal of 1321403023 is 3203041231.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321403023 is a prime.

It is a super-2 number, since 2×1321403023² = 3492211898387077058, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321403033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660701511 + 660701512.

It is an arithmetic number, because the mean of its divisors is an integer number (660701512).

Almost surely, 2^1321403023 is an apocalyptic number.

1321403023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321403023 is an equidigital number, since it uses as much as digits as its factorization.

1321403023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1321403023 is about 36351.1075897283. The cubic root of 1321403023 is about 1097.3498248761.

Adding to 1321403023 its reverse (3203041231), we get a palindrome (4524444254).

The spelling of 1321403023 in words is "one billion, three hundred twenty-one million, four hundred three thousand, twenty-three".