654860401 has 4 divisors (see below), whose sum is σ = 705234292. Its totient is φ = 604486512.

The previous prime is 654860369. The next prime is 654860407. The reversal of 654860401 is 104068456.

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 37834801 + 617025600 = 6151^2 + 24840^2 .

It is a cyclic number.

It is not a de Polignac number, because 654860401 - 2⁵ = 654860369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (654860407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25186926 + ... + 25186951.

It is an arithmetic number, because the mean of its divisors is an integer number (176308573).

Almost surely, 2^654860401 is an apocalyptic number.

It is an amenable number.

654860401 is a deficient number, since it is larger than the sum of its proper divisors (50373891).

654860401 is a wasteful number, since it uses less digits than its factorization.

654860401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50373890.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 654860401 is about 25590.2403466634. The cubic root of 654860401 is about 868.3928584895.

The spelling of 654860401 in words is "six hundred fifty-four million, eight hundred sixty thousand, four hundred one".