609534139 has 2 divisors, whose sum is σ = 609534140. Its totient is φ = 609534138.

The previous prime is 609534137. The next prime is 609534169. The reversal of 609534139 is 931435906.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 609534139 - 2¹ = 609534137 is a prime.

Together with 609534137, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (609534137) 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, 304767069 + 304767070.

It is an arithmetic number, because the mean of its divisors is an integer number (304767070).

Almost surely, 2^609534139 is an apocalyptic number.

609534139 is a deficient number, since it is larger than the sum of its proper divisors (1).

609534139 is an equidigital number, since it uses as much as digits as its factorization.

609534139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87480, while the sum is 40.

The square root of 609534139 is about 24688.7451888507. The cubic root of 609534139 is about 847.8766559024.

The spelling of 609534139 in words is "six hundred nine million, five hundred thirty-four thousand, one hundred thirty-nine".