654373261 has 2 divisors, whose sum is σ = 654373262. Its totient is φ = 654373260.

The previous prime is 654373249. The next prime is 654373297. The reversal of 654373261 is 162373456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 356983236 + 297390025 = 18894^2 + 17245^2 .

It is a cyclic number.

It is not a de Polignac number, because 654373261 - 2⁵ = 654373229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 654373261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (654373361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327186630 + 327186631.

It is an arithmetic number, because the mean of its divisors is an integer number (327186631).

Almost surely, 2^654373261 is an apocalyptic number.

It is an amenable number.

654373261 is a deficient number, since it is larger than the sum of its proper divisors (1).

654373261 is an equidigital number, since it uses as much as digits as its factorization.

654373261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 37.

The square root of 654373261 is about 25580.7204941534. The cubic root of 654373261 is about 868.1774773006.

The spelling of 654373261 in words is "six hundred fifty-four million, three hundred seventy-three thousand, two hundred sixty-one".