1166238457 has 2 divisors, whose sum is σ = 1166238458. Its totient is φ = 1166238456.

The previous prime is 1166238439. The next prime is 1166238497. The reversal of 1166238457 is 7548326611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 810199296 + 356039161 = 28464^2 + 18869^2 .

It is a cyclic number.

It is not a de Polignac number, because 1166238457 - 2²⁷ = 1032020729 is a prime.

It is a super-2 number, since 2×1166238457² = 2720224277171481698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1166238497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583119228 + 583119229.

It is an arithmetic number, because the mean of its divisors is an integer number (583119229).

Almost surely, 2^1166238457 is an apocalyptic number.

It is an amenable number.

1166238457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166238457 is an equidigital number, since it uses as much as digits as its factorization.

1166238457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 43.

The square root of 1166238457 is about 34150.2336302404. The cubic root of 1166238457 is about 1052.5977873610.

The spelling of 1166238457 in words is "one billion, one hundred sixty-six million, two hundred thirty-eight thousand, four hundred fifty-seven".