609799 has 4 divisors (see below), whose sum is σ = 636336. Its totient is φ = 583264.

The previous prime is 609781. The next prime is 609803. The reversal of 609799 is 997906.

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

It is a cyclic number.

It is not a de Polignac number, because 609799 - 2¹³ = 601607 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 (609709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13234 + ... + 13279.

It is an arithmetic number, because the mean of its divisors is an integer number (159084).

2⁶⁰⁹⁷⁹⁹ is an apocalyptic number.

609799 is a deficient number, since it is larger than the sum of its proper divisors (26537).

609799 is a wasteful number, since it uses less digits than its factorization.

609799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26536.

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

The square root of 609799 is about 780.8962799245. The cubic root of 609799 is about 84.7999447460.

It can be divided in two parts, 609 and 799, that multiplied together give a triangular number (486591 = T₉₈₆).

The spelling of 609799 in words is "six hundred nine thousand, seven hundred ninety-nine".