654244861 has 4 divisors (see below), whose sum is σ = 654333724. Its totient is φ = 654156000.

The previous prime is 654244817. The next prime is 654244873. The reversal of 654244861 is 168442456.

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

It can be written as a sum of positive squares in 2 ways, for example, as 479872836 + 174372025 = 21906^2 + 13205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-654244861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654244891) 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, 32280 + ... + 48481.

It is an arithmetic number, because the mean of its divisors is an integer number (163583431).

Almost surely, 2^654244861 is an apocalyptic number.

It is an amenable number.

654244861 is a deficient number, since it is larger than the sum of its proper divisors (88863).

654244861 is an equidigital number, since it uses as much as digits as its factorization.

654244861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88862.

The product of its digits is 184320, while the sum is 40.

The square root of 654244861 is about 25578.2106684576. The cubic root of 654244861 is about 868.1206894872.

The spelling of 654244861 in words is "six hundred fifty-four million, two hundred forty-four thousand, eight hundred sixty-one".