1131580279 has 12 divisors (see below), whose sum is σ = 1174672480. Its totient is φ = 1089878400.

The previous prime is 1131580253. The next prime is 1131580297. The reversal of 1131580279 is 9720851311.

It is not a de Polignac number, because 1131580279 - 2⁹ = 1131579767 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131580579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128539 + ... + 137059.

Almost surely, 2^1131580279 is an apocalyptic number.

1131580279 is a deficient number, since it is larger than the sum of its proper divisors (43092201).

1131580279 is an frugal number, since it uses more digits than its factorization.

1131580279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8682 (or 8641 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 1131580279 is about 33638.9696483112. The cubic root of 1131580279 is about 1042.0657532344.

The spelling of 1131580279 in words is "one billion, one hundred thirty-one million, five hundred eighty thousand, two hundred seventy-nine".