606916909 has 2 divisors, whose sum is σ = 606916910. Its totient is φ = 606916908.

The previous prime is 606916907. The next prime is 606916913. The reversal of 606916909 is 909619606.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 389944009 + 216972900 = 19747^2 + 14730^2 .

It is a cyclic number.

It is not a de Polignac number, because 606916909 - 2¹ = 606916907 is a prime.

It is a super-2 number, since 2×606916909² = 736696268860228562, which contains 22 as substring.

Together with 606916907, it forms a pair of twin primes.

606916909 is a strobogrammatic number because it is the same when read upside-down.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (606916907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 303458454 + 303458455.

It is an arithmetic number, because the mean of its divisors is an integer number (303458455).

Almost surely, 2^606916909 is an apocalyptic number.

It is an amenable number.

606916909 is a deficient number, since it is larger than the sum of its proper divisors (1).

606916909 is an equidigital number, since it uses as much as digits as its factorization.

606916909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 157464, while the sum is 46.

The square root of 606916909 is about 24635.6836519712. The cubic root of 606916909 is about 846.6613715302.

It can be divided in two parts, 60691 and 6909, that added together give a square (67600 = 260²).

The spelling of 606916909 in words is "six hundred six million, nine hundred sixteen thousand, nine hundred nine".