654321049 has 2 divisors, whose sum is σ = 654321050. Its totient is φ = 654321048.

The previous prime is 654321047. The next prime is 654321071. The reversal of 654321049 is 940123456.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 617025600 + 37295449 = 24840^2 + 6107^2 .

It is a cyclic number.

It is not a de Polignac number, because 654321049 - 2¹ = 654321047 is a prime.

Together with 654321047, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (654321047) 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 as a sum of consecutive naturals, namely, 327160524 + 327160525.

It is an arithmetic number, because the mean of its divisors is an integer number (327160525).

Almost surely, 2^654321049 is an apocalyptic number.

It is an amenable number.

654321049 is a deficient number, since it is larger than the sum of its proper divisors (1).

654321049 is an equidigital number, since it uses as much as digits as its factorization.

654321049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 654321049 is about 25579.6999396005. The cubic root of 654321049 is about 868.1543862551.

The spelling of 654321049 in words is "six hundred fifty-four million, three hundred twenty-one thousand, forty-nine".