601320649 has 2 divisors, whose sum is σ = 601320650. Its totient is φ = 601320648.

The previous prime is 601320647. The next prime is 601320691. The reversal of 601320649 is 946023106.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 469805625 + 131515024 = 21675^2 + 11468^2 .

It is a cyclic number.

It is not a de Polignac number, because 601320649 - 2¹ = 601320647 is a prime.

Together with 601320647, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 601320649.

It is not a weakly prime, because it can be changed into another prime (601320647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 300660324 + 300660325.

It is an arithmetic number, because the mean of its divisors is an integer number (300660325).

Almost surely, 2^601320649 is an apocalyptic number.

It is an amenable number.

601320649 is a deficient number, since it is larger than the sum of its proper divisors (1).

601320649 is an equidigital number, since it uses as much as digits as its factorization.

601320649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 601320649 is about 24521.8402449735. The cubic root of 601320649 is about 844.0510332229.

It can be divided in two parts, 6013 and 20649, that added together give a palindrome (26662).

The spelling of 601320649 in words is "six hundred one million, three hundred twenty thousand, six hundred forty-nine".