1131897549 has 8 divisors (see below), whose sum is σ = 1530453312. Its totient is φ = 743970080.

The previous prime is 1131897541. The next prime is 1131897577. The reversal of 1131897549 is 9457981311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1131897549 - 2³ = 1131897541 is a prime.

It is a super-2 number, since 2×1131897549² = 2562384122864414802, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1131897498 and 1131897507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131897541) 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 7 ways as a sum of consecutive naturals, for example, 2656824 + ... + 2657249.

It is an arithmetic number, because the mean of its divisors is an integer number (191306664).

Almost surely, 2^1131897549 is an apocalyptic number.

It is an amenable number.

1131897549 is a deficient number, since it is larger than the sum of its proper divisors (398555763).

1131897549 is an equidigital number, since it uses as much as digits as its factorization.

1131897549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5314147.

The product of its digits is 272160, while the sum is 48.

The square root of 1131897549 is about 33643.6851281188. The cubic root of 1131897549 is about 1042.1631348382.

The spelling of 1131897549 in words is "one billion, one hundred thirty-one million, eight hundred ninety-seven thousand, five hundred forty-nine".