1606606249 has 2 divisors, whose sum is σ = 1606606250. Its totient is φ = 1606606248.

The previous prime is 1606606229. The next prime is 1606606271. The reversal of 1606606249 is 9426066061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1108423849 + 498182400 = 33293^2 + 22320^2 .

It is an emirp because it is prime and its reverse (9426066061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1606606249 - 2⁷ = 1606606121 is a prime.

It is not a weakly prime, because it can be changed into another prime (1606606229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 803303124 + 803303125.

It is an arithmetic number, because the mean of its divisors is an integer number (803303125).

Almost surely, 2^1606606249 is an apocalyptic number.

It is an amenable number.

1606606249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1606606249 is an equidigital number, since it uses as much as digits as its factorization.

1606606249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 1606606249 is about 40082.4930487114. The cubic root of 1606606249 is about 1171.2146173136.

The spelling of 1606606249 in words is "one billion, six hundred six million, six hundred six thousand, two hundred forty-nine".