654331 has 4 divisors (see below), whose sum is σ = 669592. Its totient is φ = 639072.

The previous prime is 654323. The next prime is 654343. The reversal of 654331 is 133456.

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 654331 - 2³ = 654323 is a prime.

It is a super-2 number, since 2×654331² = 856298115122, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (654301) 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, 7566 + ... + 7651.

It is an arithmetic number, because the mean of its divisors is an integer number (167398).

2⁶⁵⁴³³¹ is an apocalyptic number.

654331 is a deficient number, since it is larger than the sum of its proper divisors (15261).

654331 is a wasteful number, since it uses less digits than its factorization.

654331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15260.

The product of its digits is 1080, while the sum is 22.

The square root of 654331 is about 808.9072876418. The cubic root of 654331 is about 86.8158787235.

Adding to 654331 its reverse (133456), we get a palindrome (787787).

The spelling of 654331 in words is "six hundred fifty-four thousand, three hundred thirty-one".