1321450393 has 2 divisors, whose sum is σ = 1321450394. Its totient is φ = 1321450392.

The previous prime is 1321450391. The next prime is 1321450421. The reversal of 1321450393 is 3930541231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1150023744 + 171426649 = 33912^2 + 13093^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321450393 - 2¹ = 1321450391 is a prime.

It is a super-2 number, since 2×1321450393² = 3492462282319708898, which contains 22 as substring.

Together with 1321450391, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1321450391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660725196 + 660725197.

It is an arithmetic number, because the mean of its divisors is an integer number (660725197).

Almost surely, 2^1321450393 is an apocalyptic number.

It is an amenable number.

1321450393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321450393 is an equidigital number, since it uses as much as digits as its factorization.

1321450393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 1321450393 is about 36351.7591458790. The cubic root of 1321450393 is about 1097.3629374136.

The spelling of 1321450393 in words is "one billion, three hundred twenty-one million, four hundred fifty thousand, three hundred ninety-three".