1223231993 has 2 divisors, whose sum is σ = 1223231994. Its totient is φ = 1223231992.

The previous prime is 1223231987. The next prime is 1223232029. The reversal of 1223231993 is 3991323221.

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., 835614649 + 387617344 = 28907^2 + 19688^2 .

It is an emirp because it is prime and its reverse (3991323221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1223231993 - 2¹⁶ = 1223166457 is a prime.

It is a super-3 number, since 3×1223231993³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1223231953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611615996 + 611615997.

It is an arithmetic number, because the mean of its divisors is an integer number (611615997).

Almost surely, 2^1223231993 is an apocalyptic number.

It is an amenable number.

1223231993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223231993 is an equidigital number, since it uses as much as digits as its factorization.

1223231993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 35.

The square root of 1223231993 is about 34974.7336372988. The cubic root of 1223231993 is about 1069.4724720790.

The spelling of 1223231993 in words is "one billion, two hundred twenty-three million, two hundred thirty-one thousand, nine hundred ninety-three".