1131681839 has 8 divisors (see below), whose sum is σ = 1156239360. Its totient is φ = 1107144376.

The previous prime is 1131681833. The next prime is 1131681847. The reversal of 1131681839 is 9381861311.

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-1131681839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1131681796 and 1131681805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131681833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188762 + ... + 194664.

It is an arithmetic number, because the mean of its divisors is an integer number (144529920).

Almost surely, 2^1131681839 is an apocalyptic number.

1131681839 is a deficient number, since it is larger than the sum of its proper divisors (24557521).

1131681839 is an equidigital number, since it uses as much as digits as its factorization.

1131681839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10029.

The product of its digits is 31104, while the sum is 41.

The square root of 1131681839 is about 33640.4791731628. The cubic root of 1131681839 is about 1042.0969276412.

The spelling of 1131681839 in words is "one billion, one hundred thirty-one million, six hundred eighty-one thousand, eight hundred thirty-nine".