1233221993 has 2 divisors, whose sum is σ = 1233221994. Its totient is φ = 1233221992.

The previous prime is 1233221959. The next prime is 1233222017. The reversal of 1233221993 is 3991223321.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1129833769 + 103388224 = 33613^2 + 10168^2 .

It is a cyclic number.

It is not a de Polignac number, because 1233221993 - 2¹⁴ = 1233205609 is a prime.

It is a super-4 number, since 4×1233221993⁴ (a number of 37 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (1233227993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616610996 + 616610997.

It is an arithmetic number, because the mean of its divisors is an integer number (616610997).

Almost surely, 2^1233221993 is an apocalyptic number.

It is an amenable number.

1233221993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1233221993 is an equidigital number, since it uses as much as digits as its factorization.

1233221993 is an evil number, because the sum of its binary digits is even.

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

The square root of 1233221993 is about 35117.2606135501. The cubic root of 1233221993 is about 1072.3760031101.

The spelling of 1233221993 in words is "one billion, two hundred thirty-three million, two hundred twenty-one thousand, nine hundred ninety-three".