1137891161 has 8 divisors (see below), whose sum is σ = 1253388864. Its totient is φ = 1024402320.

The previous prime is 1137891151. The next prime is 1137891253. The reversal of 1137891161 is 1611987311.

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 1137891161 - 2²² = 1133696857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1137891151) 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, 501026 + ... + 503291.

It is an arithmetic number, because the mean of its divisors is an integer number (156673608).

Almost surely, 2^1137891161 is an apocalyptic number.

1137891161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1137891161 is a deficient number, since it is larger than the sum of its proper divisors (115497703).

1137891161 is a wasteful number, since it uses less digits than its factorization.

1137891161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004431.

The product of its digits is 9072, while the sum is 38.

The square root of 1137891161 is about 33732.6423661118. The cubic root of 1137891161 is about 1043.9993813089. Note that the first 3 decimals are identical.

It can be divided in two parts, 1137 and 891161, that added together give a palindrome (892298).

The spelling of 1137891161 in words is "one billion, one hundred thirty-seven million, eight hundred ninety-one thousand, one hundred sixty-one".