1131944697 has 12 divisors (see below), whose sum is σ = 1760803044. Its totient is φ = 696581280.

The previous prime is 1131944659. The next prime is 1131944831. The reversal of 1131944697 is 7964491311.

It is a happy number.

1131944697 is a `hidden beast` number, since 113 + 1 + 9 + 446 + 97 = 666.

1131944697 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 327031056 + 804913641 = 18084^2 + 28371^2 .

It is not a de Polignac number, because 1131944697 - 2²⁴ = 1115167481 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1131944197) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4837254 + ... + 4837487.

It is an arithmetic number, because the mean of its divisors is an integer number (146733587).

Almost surely, 2^1131944697 is an apocalyptic number.

It is an amenable number.

1131944697 is a deficient number, since it is larger than the sum of its proper divisors (628858347).

1131944697 is a wasteful number, since it uses less digits than its factorization.

1131944697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9674760 (or 9674757 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 1131944697 is about 33644.3858169532. The cubic root of 1131944697 is about 1042.1776047065.

The spelling of 1131944697 in words is "one billion, one hundred thirty-one million, nine hundred forty-four thousand, six hundred ninety-seven".