654643117 has 4 divisors (see below), whose sum is σ = 654694816. Its totient is φ = 654591420.

The previous prime is 654643111. The next prime is 654643139. The reversal of 654643117 is 711346456.

654643117 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 a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 654643117 - 2¹⁵ = 654610349 is a prime.

It is a super-2 number, since 2×654643117² = 857115221270951378, which contains 22 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 (654643111) 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, 7408 + ... + 36934.

It is an arithmetic number, because the mean of its divisors is an integer number (163673704).

Almost surely, 2^654643117 is an apocalyptic number.

It is an amenable number.

654643117 is a deficient number, since it is larger than the sum of its proper divisors (51699).

654643117 is a wasteful number, since it uses less digits than its factorization.

654643117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51698.

The product of its digits is 60480, while the sum is 37.

The square root of 654643117 is about 25585.9945477990. The cubic root of 654643117 is about 868.2968030318.

The spelling of 654643117 in words is "six hundred fifty-four million, six hundred forty-three thousand, one hundred seventeen".