1163749709 has 4 divisors (see below), whose sum is σ = 1163996316. Its totient is φ = 1163503104.

The previous prime is 1163749669. The next prime is 1163749771. The reversal of 1163749709 is 9079473611.

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

It can be written as a sum of positive squares in 2 ways, for example, as 986274025 + 177475684 = 31405^2 + 13322^2 .

It is a cyclic number.

It is not a de Polignac number, because 1163749709 - 2¹⁶ = 1163684173 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 (1163749109) 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, 116084 + ... + 125709.

It is an arithmetic number, because the mean of its divisors is an integer number (290999079).

Almost surely, 2^1163749709 is an apocalyptic number.

It is an amenable number.

1163749709 is a deficient number, since it is larger than the sum of its proper divisors (246607).

1163749709 is an equidigital number, since it uses as much as digits as its factorization.

1163749709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246606.

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 1163749709 is about 34113.7759416925. The cubic root of 1163749709 is about 1051.8485076930.

The spelling of 1163749709 in words is "one billion, one hundred sixty-three million, seven hundred forty-nine thousand, seven hundred nine".