1166921533 has 2 divisors, whose sum is σ = 1166921534. Its totient is φ = 1166921532.

The previous prime is 1166921527. The next prime is 1166921557. The reversal of 1166921533 is 3351296611.

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., 1131851449 + 35070084 = 33643^2 + 5922^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1166921533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1166921492 and 1166921501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1166921333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583460766 + 583460767.

It is an arithmetic number, because the mean of its divisors is an integer number (583460767).

Almost surely, 2^1166921533 is an apocalyptic number.

It is an amenable number.

1166921533 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166921533 is an equidigital number, since it uses as much as digits as its factorization.

1166921533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29160, while the sum is 37.

The square root of 1166921533 is about 34160.2332105622. The cubic root of 1166921533 is about 1052.8032524760.

The spelling of 1166921533 in words is "one billion, one hundred sixty-six million, nine hundred twenty-one thousand, five hundred thirty-three".