654431 has 4 divisors (see below), whose sum is σ = 659712. Its totient is φ = 649152.

The previous prime is 654427. The next prime is 654439. The reversal of 654431 is 134456.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 654431 - 2² = 654427 is a prime.

It is a super-2 number, since 2×654431² = 856559867522, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 654397 and 654406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654439) 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, 2450 + ... + 2703.

It is an arithmetic number, because the mean of its divisors is an integer number (164928).

2⁶⁵⁴⁴³¹ is an apocalyptic number.

654431 is a deficient number, since it is larger than the sum of its proper divisors (5281).

654431 is a wasteful number, since it uses less digits than its factorization.

654431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5280.

The product of its digits is 1440, while the sum is 23.

The square root of 654431 is about 808.9690970612. The cubic root of 654431 is about 86.8203011262.

Adding to 654431 its reverse (134456), we get a palindrome (788887).

The spelling of 654431 in words is "six hundred fifty-four thousand, four hundred thirty-one".