609989431 has 16 divisors (see below), whose sum is σ = 633392928. Its totient is φ = 587059200.

The previous prime is 609989389. The next prime is 609989441. The reversal of 609989431 is 134989906.

It is a cyclic number.

It is not a de Polignac number, because 609989431 - 2¹¹ = 609987383 is a prime.

It is a super-2 number, since 2×609989431² = 744174211863407522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609989441) 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 15 ways as a sum of consecutive naturals, for example, 1242096 + ... + 1242586.

It is an arithmetic number, because the mean of its divisors is an integer number (39587058).

Almost surely, 2^609989431 is an apocalyptic number.

609989431 is a deficient number, since it is larger than the sum of its proper divisors (23403497).

609989431 is a wasteful number, since it uses less digits than its factorization.

609989431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 882.

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 609989431 is about 24697.9641063793. The cubic root of 609989431 is about 848.0877107381.

The spelling of 609989431 in words is "six hundred nine million, nine hundred eighty-nine thousand, four hundred thirty-one".