654051321709 has 2 divisors, whose sum is σ = 654051321710. Its totient is φ = 654051321708.

The previous prime is 654051321631. The next prime is 654051321719. The reversal of 654051321709 is 907123150456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 481143386025 + 172907935684 = 693645^2 + 415822^2 .

It is a cyclic number.

It is not a de Polignac number, because 654051321709 - 2²¹ = 654049224557 is a prime.

It is a super-3 number, since 3×654051321709³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (654051321719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327025660854 + 327025660855.

It is an arithmetic number, because the mean of its divisors is an integer number (327025660855).

Almost surely, 2^654051321709 is an apocalyptic number.

It is an amenable number.

654051321709 is a deficient number, since it is larger than the sum of its proper divisors (1).

654051321709 is an equidigital number, since it uses as much as digits as its factorization.

654051321709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 43.

The spelling of 654051321709 in words is "six hundred fifty-four billion, fifty-one million, three hundred twenty-one thousand, seven hundred nine".