1166353543 has 4 divisors (see below), whose sum is σ = 1193478088. Its totient is φ = 1139229000.

The previous prime is 1166353541. The next prime is 1166353547. The reversal of 1166353543 is 3453536611.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1166353543 - 2¹ = 1166353541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166353541) 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, 13562208 + ... + 13562293.

It is an arithmetic number, because the mean of its divisors is an integer number (298369522).

Almost surely, 2^1166353543 is an apocalyptic number.

1166353543 is a deficient number, since it is larger than the sum of its proper divisors (27124545).

1166353543 is an equidigital number, since it uses as much as digits as its factorization.

1166353543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27124544.

The product of its digits is 97200, while the sum is 37.

The square root of 1166353543 is about 34151.9185844661. The cubic root of 1166353543 is about 1052.6324101501.

The spelling of 1166353543 in words is "one billion, one hundred sixty-six million, three hundred fifty-three thousand, five hundred forty-three".