1166889953 has 4 divisors (see below), whose sum is σ = 1167101460. Its totient is φ = 1166678448.

The previous prime is 1166889943. The next prime is 1166889973. The reversal of 1166889953 is 3599886611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3599886611 = 347 ⋅10374313.

It can be written as a sum of positive squares in 2 ways, for example, as 425308129 + 741581824 = 20623^2 + 27232^2 .

It is a cyclic number.

It is not a de Polignac number, because 1166889953 - 2⁴ = 1166889937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1166889943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97250 + ... + 108587.

It is an arithmetic number, because the mean of its divisors is an integer number (291775365).

Almost surely, 2^1166889953 is an apocalyptic number.

It is an amenable number.

1166889953 is a deficient number, since it is larger than the sum of its proper divisors (211507).

1166889953 is an equidigital number, since it uses as much as digits as its factorization.

1166889953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211506.

The product of its digits is 2799360, while the sum is 56.

The square root of 1166889953 is about 34159.7709740566. The cubic root of 1166889953 is about 1052.7937551717.

The spelling of 1166889953 in words is "one billion, one hundred sixty-six million, eight hundred eighty-nine thousand, nine hundred fifty-three".