1321818383 has 2 divisors, whose sum is σ = 1321818384. Its totient is φ = 1321818382.

The previous prime is 1321818367. The next prime is 1321818439. The reversal of 1321818383 is 3838181231.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (3838181231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1321818383 - 2⁴ = 1321818367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321818313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660909191 + 660909192.

It is an arithmetic number, because the mean of its divisors is an integer number (660909192).

Almost surely, 2^1321818383 is an apocalyptic number.

1321818383 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321818383 is an equidigital number, since it uses as much as digits as its factorization.

1321818383 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 38.

The square root of 1321818383 is about 36356.8203092625. The cubic root of 1321818383 is about 1097.4647904258.

The spelling of 1321818383 in words is "one billion, three hundred twenty-one million, eight hundred eighteen thousand, three hundred eighty-three".