654041821 has 8 divisors (see below), whose sum is σ = 664614720. Its totient is φ = 643512672.

The previous prime is 654041819. The next prime is 654041837. The reversal of 654041821 is 128140456.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 654041821 - 2¹ = 654041819 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 (654041851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19896 + ... + 41278.

It is an arithmetic number, because the mean of its divisors is an integer number (83076840).

Almost surely, 2^654041821 is an apocalyptic number.

It is an amenable number.

654041821 is a deficient number, since it is larger than the sum of its proper divisors (10572899).

654041821 is a wasteful number, since it uses less digits than its factorization.

654041821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21875.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 654041821 is about 25574.2413572720. The cubic root of 654041821 is about 868.0308752741.

The spelling of 654041821 in words is "six hundred fifty-four million, forty-one thousand, eight hundred twenty-one".