609431 has 4 divisors (see below), whose sum is σ = 635952. Its totient is φ = 582912.

The previous prime is 609421. The next prime is 609437. The reversal of 609431 is 134906.

609431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134906 = 2 ⋅67453.

It is not a de Polignac number, because 609431 - 2¹⁸ = 347287 is a prime.

It is a super-2 number, since 2×609431² = 742812287522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 26497 = 609431 / (6 + 0 + 9 + 4 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 609397 and 609406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609437) 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, 13226 + ... + 13271.

It is an arithmetic number, because the mean of its divisors is an integer number (158988).

2⁶⁰⁹⁴³¹ is an apocalyptic number.

609431 is a deficient number, since it is larger than the sum of its proper divisors (26521).

609431 is a wasteful number, since it uses less digits than its factorization.

609431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26520.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 609431 is about 780.6606176822. The cubic root of 609431 is about 84.7828830261.

The spelling of 609431 in words is "six hundred nine thousand, four hundred thirty-one".