610206409 has 2 divisors, whose sum is σ = 610206410. Its totient is φ = 610206408.

The previous prime is 610206407. The next prime is 610206419. The reversal of 610206409 is 904602016.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 593166025 + 17040384 = 24355^2 + 4128^2 .

It is a cyclic number.

It is not a de Polignac number, because 610206409 - 2¹ = 610206407 is a prime.

Together with 610206407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (610206407) 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, 305103204 + 305103205.

It is an arithmetic number, because the mean of its divisors is an integer number (305103205).

Almost surely, 2^610206409 is an apocalyptic number.

It is an amenable number.

610206409 is a deficient number, since it is larger than the sum of its proper divisors (1).

610206409 is an equidigital number, since it uses as much as digits as its factorization.

610206409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 610206409 is about 24702.3563450939. The cubic root of 610206409 is about 848.1882559561.

The spelling of 610206409 in words is "six hundred ten million, two hundred six thousand, four hundred nine".