609831 has 6 divisors (see below), whose sum is σ = 880880. Its totient is φ = 406548.

The previous prime is 609821. The next prime is 609859. The reversal of 609831 is 138906.

609831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 609831 - 2¹⁴ = 593447 is a prime.

It is a super-2 number, since 2×609831² = 743787697122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 609795 and 609804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33871 + ... + 33888.

2⁶⁰⁹⁸³¹ is an apocalyptic number.

609831 is a deficient number, since it is larger than the sum of its proper divisors (271049).

609831 is a wasteful number, since it uses less digits than its factorization.

609831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67765 (or 67762 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 609831 is about 780.9167689325. The cubic root of 609831 is about 84.8014280494.

The spelling of 609831 in words is "six hundred nine thousand, eight hundred thirty-one".