654320105 has 4 divisors (see below), whose sum is σ = 785184132. Its totient is φ = 523456080.

The previous prime is 654320071. The next prime is 654320111. The reversal of 654320105 is 501023456.

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 429649984 + 224670121 = 20728^2 + 14989^2 .

It is not a de Polignac number, because 654320105 - 2⁸ = 654319849 is a prime.

It is a super-2 number, since 2×654320105² = 856269599614422050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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, 65432006 + ... + 65432015.

It is an arithmetic number, because the mean of its divisors is an integer number (196296033).

Almost surely, 2^654320105 is an apocalyptic number.

It is an amenable number.

654320105 is a deficient number, since it is larger than the sum of its proper divisors (130864027).

654320105 is a wasteful number, since it uses less digits than its factorization.

654320105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130864026.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 654320105 is about 25579.6814874619. The cubic root of 654320105 is about 868.1539687546.

The spelling of 654320105 in words is "six hundred fifty-four million, three hundred twenty thousand, one hundred five".