609997 has 2 divisors, whose sum is σ = 609998. Its totient is φ = 609996.

The previous prime is 609991. The next prime is 610031. The reversal of 609997 is 799906.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 609961 + 36 = 781^2 + 6^2 .

It is a cyclic number.

It is not a de Polignac number, because 609997 - 2³ = 609989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (609991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304998 + 304999.

It is an arithmetic number, because the mean of its divisors is an integer number (304999).

2⁶⁰⁹⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

609997 is a deficient number, since it is larger than the sum of its proper divisors (1).

609997 is an equidigital number, since it uses as much as digits as its factorization.

609997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30618, while the sum is 40.

The square root of 609997 is about 781.0230470351. The cubic root of 609997 is about 84.8091218531.

The spelling of 609997 in words is "six hundred nine thousand, nine hundred ninety-seven".