231134009 has 2 divisors, whose sum is σ = 231134010. Its totient is φ = 231134008.

The previous prime is 231133997. The next prime is 231134011. The reversal of 231134009 is 900431132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165199609 + 65934400 = 12853^2 + 8120^2 .

It is a cyclic number.

It is not a de Polignac number, because 231134009 - 2¹⁶ = 231068473 is a prime.

Together with 231134011, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (231134809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115567004 + 115567005.

It is an arithmetic number, because the mean of its divisors is an integer number (115567005).

Almost surely, 2^231134009 is an apocalyptic number.

It is an amenable number.

231134009 is a deficient number, since it is larger than the sum of its proper divisors (1).

231134009 is an equidigital number, since it uses as much as digits as its factorization.

231134009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 231134009 is about 15203.0920868092. The cubic root of 231134009 is about 613.6978720264.

The spelling of 231134009 in words is "two hundred thirty-one million, one hundred thirty-four thousand, nine".