609631 has 8 divisors (see below), whose sum is σ = 671184. Its totient is φ = 549120.

The previous prime is 609619. The next prime is 609641. The reversal of 609631 is 136906.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 609631 - 2⁵ = 609599 is a prime.

It is a super-2 number, since 2×609631² = 743299912322, 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 = 609596 and 609605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1551 + ... + 1903.

It is an arithmetic number, because the mean of its divisors is an integer number (83898).

2⁶⁰⁹⁶³¹ is an apocalyptic number.

609631 is a deficient number, since it is larger than the sum of its proper divisors (61553).

609631 is a wasteful number, since it uses less digits than its factorization.

609631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 609631 is about 780.7887038117. The cubic root of 609631 is about 84.7921565518.

The spelling of 609631 in words is "six hundred nine thousand, six hundred thirty-one".