609821263 has 4 divisors (see below), whose sum is σ = 645693120. Its totient is φ = 573949408.

The previous prime is 609821239. The next prime is 609821269. The reversal of 609821263 is 362128906.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 362128906 = 2 ⋅181064453.

It is a cyclic number.

It is not a de Polignac number, because 609821263 - 2²⁹ = 72950351 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 (609821269) 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, 17935903 + ... + 17935936.

It is an arithmetic number, because the mean of its divisors is an integer number (161423280).

Almost surely, 2^609821263 is an apocalyptic number.

609821263 is a deficient number, since it is larger than the sum of its proper divisors (35871857).

609821263 is a wasteful number, since it uses less digits than its factorization.

609821263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35871856.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 609821263 is about 24694.5593805599. The cubic root of 609821263 is about 848.0097671349.

The spelling of 609821263 in words is "six hundred nine million, eight hundred twenty-one thousand, two hundred sixty-three".