1163645689 has 4 divisors (see below), whose sum is σ = 1163873124. Its totient is φ = 1163418256.

The previous prime is 1163645683. The next prime is 1163645759. The reversal of 1163645689 is 9865463611.

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 1029896464 + 133749225 = 32092^2 + 11565^2 .

It is a cyclic number.

It is not a de Polignac number, because 1163645689 - 2⁵ = 1163645657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1163645683) 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, 105862 + ... + 116335.

It is an arithmetic number, because the mean of its divisors is an integer number (290968281).

Almost surely, 2^1163645689 is an apocalyptic number.

It is an amenable number.

1163645689 is a deficient number, since it is larger than the sum of its proper divisors (227435).

1163645689 is an equidigital number, since it uses as much as digits as its factorization.

1163645689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227434.

The product of its digits is 933120, while the sum is 49.

The square root of 1163645689 is about 34112.2513036006. The cubic root of 1163645689 is about 1051.8171674655.

The spelling of 1163645689 in words is "one billion, one hundred sixty-three million, six hundred forty-five thousand, six hundred eighty-nine".