1131813958 has 16 divisors (see below), whose sum is σ = 1853001360. Its totient is φ = 514199200.

The previous prime is 1131813901. The next prime is 1131813971. The reversal of 1131813958 is 8593181311.

It is a self number, because there is not a number n which added to its sum of digits gives 1131813958.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35088 + ... + 59116.

It is an arithmetic number, because the mean of its divisors is an integer number (115812585).

Almost surely, 2^1131813958 is an apocalyptic number.

1131813958 is a deficient number, since it is larger than the sum of its proper divisors (721187402).

1131813958 is a wasteful number, since it uses less digits than its factorization.

1131813958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26183.

The product of its digits is 25920, while the sum is 40.

The square root of 1131813958 is about 33642.4428066691. The cubic root of 1131813958 is about 1042.1374795118.

The spelling of 1131813958 in words is "one billion, one hundred thirty-one million, eight hundred thirteen thousand, nine hundred fifty-eight".