671000234909 has 2 divisors, whose sum is σ = 671000234910. Its totient is φ = 671000234908.

The previous prime is 671000234881. The next prime is 671000234953. The reversal of 671000234909 is 909432000176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 668015251684 + 2984983225 = 817322^2 + 54635^2 .

It is a cyclic number.

It is not a de Polignac number, because 671000234909 - 2²⁸ = 670731799453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671000237909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335500117454 + 335500117455.

It is an arithmetic number, because the mean of its divisors is an integer number (335500117455).

Almost surely, 2^671000234909 is an apocalyptic number.

It is an amenable number.

671000234909 is a deficient number, since it is larger than the sum of its proper divisors (1).

671000234909 is an equidigital number, since it uses as much as digits as its factorization.

671000234909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 41.

The spelling of 671000234909 in words is "six hundred seventy-one billion, two hundred thirty-four thousand, nine hundred nine".