1166213239 has 2 divisors, whose sum is σ = 1166213240. Its totient is φ = 1166213238.

The previous prime is 1166213233. The next prime is 1166213261. The reversal of 1166213239 is 9323126611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1166213239 - 2⁵ = 1166213207 is a prime.

It is a super-2 number, since 2×1166213239² = 2720106637637742242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1166213233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583106619 + 583106620.

It is an arithmetic number, because the mean of its divisors is an integer number (583106620).

Almost surely, 2^1166213239 is an apocalyptic number.

1166213239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166213239 is an equidigital number, since it uses as much as digits as its factorization.

1166213239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 34.

The square root of 1166213239 is about 34149.8644067586. The cubic root of 1166213239 is about 1052.5902004042.

The spelling of 1166213239 in words is "one billion, one hundred sixty-six million, two hundred thirteen thousand, two hundred thirty-nine".