1187588313 has 6 divisors (see below), whose sum is σ = 1715405354. Its totient is φ = 791725536.

The previous prime is 1187588263. The next prime is 1187588317. The reversal of 1187588313 is 3138857811.

It can be written as a sum of positive squares in only one way, i.e., 1036002969 + 151585344 = 32187^2 + 12312^2 .

It is not a de Polignac number, because 1187588313 - 2¹⁷ = 1187457241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1187588317) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 65977120 + ... + 65977137.

Almost surely, 2^1187588313 is an apocalyptic number.

It is an amenable number.

1187588313 is a deficient number, since it is larger than the sum of its proper divisors (527817041).

1187588313 is a wasteful number, since it uses less digits than its factorization.

1187588313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131954263 (or 131954260 counting only the distinct ones).

The product of its digits is 161280, while the sum is 45.

The square root of 1187588313 is about 34461.4032360843. The cubic root of 1187588313 is about 1058.9821465209.

The spelling of 1187588313 in words is "one billion, one hundred eighty-seven million, five hundred eighty-eight thousand, three hundred thirteen".