1166431559 has 2 divisors, whose sum is σ = 1166431560. Its totient is φ = 1166431558.

The previous prime is 1166431547. The next prime is 1166431583. The reversal of 1166431559 is 9551346611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1166431559 - 2²⁸ = 897996103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1166431589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583215779 + 583215780.

It is an arithmetic number, because the mean of its divisors is an integer number (583215780).

Almost surely, 2^1166431559 is an apocalyptic number.

1166431559 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166431559 is an equidigital number, since it uses as much as digits as its factorization.

1166431559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 41.

The square root of 1166431559 is about 34153.0607559557. The cubic root of 1166431559 is about 1052.6558794031.

The spelling of 1166431559 in words is "one billion, one hundred sixty-six million, four hundred thirty-one thousand, five hundred fifty-nine".