609421647 has 4 divisors (see below), whose sum is σ = 812562200. Its totient is φ = 406281096.

The previous prime is 609421583. The next prime is 609421651. The reversal of 609421647 is 746124906.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 609421647 - 2⁶ = 609421583 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 (609421147) 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 in 3 ways as a sum of consecutive naturals, for example, 101570272 + ... + 101570277.

It is an arithmetic number, because the mean of its divisors is an integer number (203140550).

Almost surely, 2^609421647 is an apocalyptic number.

609421647 is a deficient number, since it is larger than the sum of its proper divisors (203140553).

609421647 is a wasteful number, since it uses less digits than its factorization.

609421647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203140552.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 609421647 is about 24686.4668796489. The cubic root of 609421647 is about 847.8244930002.

The spelling of 609421647 in words is "six hundred nine million, four hundred twenty-one thousand, six hundred forty-seven".