578673649 has 2 divisors, whose sum is σ = 578673650. Its totient is φ = 578673648.

The previous prime is 578673587. The next prime is 578673679. The reversal of 578673649 is 946376875.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 574800625 + 3873024 = 23975^2 + 1968^2 .

It is a cyclic number.

It is not a de Polignac number, because 578673649 - 2²³ = 570285041 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 578673649.

It is not a weakly prime, because it can be changed into another prime (578673679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 289336824 + 289336825.

It is an arithmetic number, because the mean of its divisors is an integer number (289336825).

Almost surely, 2^578673649 is an apocalyptic number.

It is an amenable number.

578673649 is a deficient number, since it is larger than the sum of its proper divisors (1).

578673649 is an equidigital number, since it uses as much as digits as its factorization.

578673649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7620480, while the sum is 55.

The square root of 578673649 is about 24055.6365328378. The cubic root of 578673649 is about 833.3189068258.

It can be divided in two parts, 57867 and 3649, that added together give a palindrome (61516).

The spelling of 578673649 in words is "five hundred seventy-eight million, six hundred seventy-three thousand, six hundred forty-nine".