609646397 has 4 divisors (see below), whose sum is σ = 617363520. Its totient is φ = 601929276.

The previous prime is 609646393. The next prime is 609646417. The reversal of 609646397 is 793646906.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 609646397 - 2² = 609646393 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609646393) 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 in 3 ways as a sum of consecutive naturals, for example, 3858443 + ... + 3858600.

It is an arithmetic number, because the mean of its divisors is an integer number (154340880).

Almost surely, 2^609646397 is an apocalyptic number.

It is an amenable number.

609646397 is a deficient number, since it is larger than the sum of its proper divisors (7717123).

609646397 is an equidigital number, since it uses as much as digits as its factorization.

609646397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7717122.

The product of its (nonzero) digits is 1469664, while the sum is 50.

The square root of 609646397 is about 24691.0185492620. The cubic root of 609646397 is about 847.9287039004.

The spelling of 609646397 in words is "six hundred nine million, six hundred forty-six thousand, three hundred ninety-seven".