609969839 has 2 divisors, whose sum is σ = 609969840. Its totient is φ = 609969838.

The previous prime is 609969817. The next prime is 609969917. The reversal of 609969839 is 938969906.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-609969839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (609939839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304984919 + 304984920.

It is an arithmetic number, because the mean of its divisors is an integer number (304984920).

Almost surely, 2^609969839 is an apocalyptic number.

609969839 is a deficient number, since it is larger than the sum of its proper divisors (1).

609969839 is an equidigital number, since it uses as much as digits as its factorization.

609969839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5668704, while the sum is 59.

The square root of 609969839 is about 24697.5674713118. The cubic root of 609969839 is about 848.0786308473.

The spelling of 609969839 in words is "six hundred nine million, nine hundred sixty-nine thousand, eight hundred thirty-nine".