1101331993 has 2 divisors, whose sum is σ = 1101331994. Its totient is φ = 1101331992.

The previous prime is 1101331981. The next prime is 1101332021. The reversal of 1101331993 is 3991331011.

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., 1067132889 + 34199104 = 32667^2 + 5848^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1101331993 is a prime.

It is not a weakly prime, because it can be changed into another prime (1101331963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550665996 + 550665997.

It is an arithmetic number, because the mean of its divisors is an integer number (550665997).

Almost surely, 2^1101331993 is an apocalyptic number.

It is an amenable number.

1101331993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101331993 is an equidigital number, since it uses as much as digits as its factorization.

1101331993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2187, while the sum is 31.

The square root of 1101331993 is about 33186.3223783534. The cubic root of 1101331993 is about 1032.6966109921.

The spelling of 1101331993 in words is "one billion, one hundred one million, three hundred thirty-one thousand, nine hundred ninety-three".