1131649831 has 8 divisors (see below), whose sum is σ = 1226178800. Its totient is φ = 1038189312.

The previous prime is 1131649817. The next prime is 1131649837. The reversal of 1131649831 is 1389461311.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1131649831 is a prime.

It is a super-2 number, since 2×1131649831² = 2561262680004657122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131649837) 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, 264906 + ... + 269143.

It is an arithmetic number, because the mean of its divisors is an integer number (153272350).

Almost surely, 2^1131649831 is an apocalyptic number.

1131649831 is a deficient number, since it is larger than the sum of its proper divisors (94528969).

1131649831 is a wasteful number, since it uses less digits than its factorization.

1131649831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534225.

The product of its digits is 15552, while the sum is 37.

The square root of 1131649831 is about 33640.0034334124. The cubic root of 1131649831 is about 1042.0871028089.

The spelling of 1131649831 in words is "one billion, one hundred thirty-one million, six hundred forty-nine thousand, eight hundred thirty-one".