1223381399 has 2 divisors, whose sum is σ = 1223381400. Its totient is φ = 1223381398.

The previous prime is 1223381389. The next prime is 1223381473. The reversal of 1223381399 is 9931833221.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1223381399 - 2⁸ = 1223381143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223381389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611690699 + 611690700.

It is an arithmetic number, because the mean of its divisors is an integer number (611690700).

Almost surely, 2^1223381399 is an apocalyptic number.

1223381399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223381399 is an equidigital number, since it uses as much as digits as its factorization.

1223381399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 41.

The square root of 1223381399 is about 34976.8694854185. The cubic root of 1223381399 is about 1069.5160122251.

The spelling of 1223381399 in words is "one billion, two hundred twenty-three million, three hundred eighty-one thousand, three hundred ninety-nine".