231108460909 has 2 divisors, whose sum is σ = 231108460910. Its totient is φ = 231108460908.

The previous prime is 231108460787. The next prime is 231108460927. The reversal of 231108460909 is 909064801132.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155983132809 + 75125328100 = 394947^2 + 274090^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231108460909 is a prime.

It is a super-2 number, since 2×231108460909² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231108460939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115554230454 + 115554230455.

It is an arithmetic number, because the mean of its divisors is an integer number (115554230455).

Almost surely, 2^231108460909 is an apocalyptic number.

It is an amenable number.

231108460909 is a deficient number, since it is larger than the sum of its proper divisors (1).

231108460909 is an equidigital number, since it uses as much as digits as its factorization.

231108460909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 231108460909 in words is "two hundred thirty-one billion, one hundred eight million, four hundred sixty thousand, nine hundred nine".