654383909 has 2 divisors, whose sum is σ = 654383910. Its totient is φ = 654383908.

The previous prime is 654383893. The next prime is 654383957. The reversal of 654383909 is 909383456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 370562500 + 283821409 = 19250^2 + 16847^2 .

It is a cyclic number.

It is not a de Polignac number, because 654383909 - 2⁴ = 654383893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (654383999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327191954 + 327191955.

It is an arithmetic number, because the mean of its divisors is an integer number (327191955).

Almost surely, 2^654383909 is an apocalyptic number.

It is an amenable number.

654383909 is a deficient number, since it is larger than the sum of its proper divisors (1).

654383909 is an equidigital number, since it uses as much as digits as its factorization.

654383909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 699840, while the sum is 47.

The square root of 654383909 is about 25580.9286187972. The cubic root of 654383909 is about 868.1821862866.

The spelling of 654383909 in words is "six hundred fifty-four million, three hundred eighty-three thousand, nine hundred nine".