612266909 has 2 divisors, whose sum is σ = 612266910. Its totient is φ = 612266908.

The previous prime is 612266891. The next prime is 612266911. The reversal of 612266909 is 909662216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 466992100 + 145274809 = 21610^2 + 12053^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-612266909 is a prime.

It is a Sophie Germain prime.

Together with 612266911, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (612266959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306133454 + 306133455.

It is an arithmetic number, because the mean of its divisors is an integer number (306133455).

Almost surely, 2^612266909 is an apocalyptic number.

It is an amenable number.

612266909 is a deficient number, since it is larger than the sum of its proper divisors (1).

612266909 is an equidigital number, since it uses as much as digits as its factorization.

612266909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 612266909 is about 24744.0277440840. The cubic root of 612266909 is about 849.1418832308.

The spelling of 612266909 in words is "six hundred twelve million, two hundred sixty-six thousand, nine hundred nine".