609638399 has 4 divisors (see below), whose sum is σ = 609864360. Its totient is φ = 609412440.

The previous prime is 609638369. The next prime is 609638431. The reversal of 609638399 is 993836906.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-609638399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 609638399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609638369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108884 + ... + 114345.

It is an arithmetic number, because the mean of its divisors is an integer number (152466090).

Almost surely, 2^609638399 is an apocalyptic number.

609638399 is a deficient number, since it is larger than the sum of its proper divisors (225961).

609638399 is a wasteful number, since it uses less digits than its factorization.

609638399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225960.

The product of its (nonzero) digits is 1889568, while the sum is 53.

The square root of 609638399 is about 24690.8565870040. The cubic root of 609638399 is about 847.9249958693.

The spelling of 609638399 in words is "six hundred nine million, six hundred thirty-eight thousand, three hundred ninety-nine".