609204857 has 2 divisors, whose sum is σ = 609204858. Its totient is φ = 609204856.

The previous prime is 609204853. The next prime is 609204859. The reversal of 609204857 is 758402906.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 575808016 + 33396841 = 23996^2 + 5779^2 .

It is a cyclic number.

It is not a de Polignac number, because 609204857 - 2² = 609204853 is a prime.

It is a super-2 number, since 2×609204857² = 742261115584780898, which contains 22 as substring.

Together with 609204859, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (609204853) 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, 304602428 + 304602429.

It is an arithmetic number, because the mean of its divisors is an integer number (304602429).

Almost surely, 2^609204857 is an apocalyptic number.

It is an amenable number.

609204857 is a deficient number, since it is larger than the sum of its proper divisors (1).

609204857 is an equidigital number, since it uses as much as digits as its factorization.

609204857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 609204857 is about 24682.0756217949. The cubic root of 609204857 is about 847.7239486719.

The spelling of 609204857 in words is "six hundred nine million, two hundred four thousand, eight hundred fifty-seven".