1231134091 has 8 divisors (see below), whose sum is σ = 1343962368. Its totient is φ = 1118457000.

The previous prime is 1231134083. The next prime is 1231134097. The reversal of 1231134091 is 1904311321.

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 1231134091 - 2³ = 1231134083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231134097) 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, 20415 + ... + 53656.

It is an arithmetic number, because the mean of its divisors is an integer number (167995296).

Almost surely, 2^1231134091 is an apocalyptic number.

1231134091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1231134091 is a deficient number, since it is larger than the sum of its proper divisors (112828277).

1231134091 is a wasteful number, since it uses less digits than its factorization.

1231134091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75593.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1231134091 is about 35087.5204453093. The cubic root of 1231134091 is about 1071.7704671535.

The spelling of 1231134091 in words is "one billion, two hundred thirty-one million, one hundred thirty-four thousand, ninety-one".