654668471 has 4 divisors (see below), whose sum is σ = 655315752. Its totient is φ = 654021192.

The previous prime is 654668437. The next prime is 654668489. The reversal of 654668471 is 174866456.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-654668471 is a prime.

It is a super-3 number, since 3×654668471³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654668401) 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, 322121 + ... + 324146.

It is an arithmetic number, because the mean of its divisors is an integer number (163828938).

Almost surely, 2^654668471 is an apocalyptic number.

654668471 is a deficient number, since it is larger than the sum of its proper divisors (647281).

654668471 is a wasteful number, since it uses less digits than its factorization.

654668471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647280.

The product of its digits is 967680, while the sum is 47.

The square root of 654668471 is about 25586.4900093780. The cubic root of 654668471 is about 868.3080124538.

It can be divided in two parts, 65466 and 8471, that added together give a palindrome (73937).

The spelling of 654668471 in words is "six hundred fifty-four million, six hundred sixty-eight thousand, four hundred seventy-one".