1161873986 has 108 divisors (see below), whose sum is σ = 2299472226. Its totient is φ = 438721920.

The previous prime is 1161873983. The next prime is 1161873989. The reversal of 1161873986 is 6893781611.

It is an interprime number because it is at equal distance from previous prime (1161873983) and next prime (1161873989).

It can be written as a sum of positive squares in 3 ways, for example, as 622752025 + 539121961 = 24955^2 + 23219^2 .

Its product of digits (435456) is a multiple of the sum of its prime divisors (126).

It is not an unprimeable number, because it can be changed into a prime (1161873983) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 15916046 + ... + 15916118.

Almost surely, 2^1161873986 is an apocalyptic number.

1161873986 is a deficient number, since it is larger than the sum of its proper divisors (1137598240).

1161873986 is a wasteful number, since it uses less digits than its factorization.

1161873986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 126 counting only the distinct ones).

The product of its digits is 435456, while the sum is 50.

The square root of 1161873986 is about 34086.2726915103. The cubic root of 1161873986 is about 1051.2830833058.

The spelling of 1161873986 in words is "one billion, one hundred sixty-one million, eight hundred seventy-three thousand, nine hundred eighty-six".