52005649 has 2 divisors, whose sum is σ = 52005650. Its totient is φ = 52005648.

The previous prime is 52005623. The next prime is 52005661. The reversal of 52005649 is 94650025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51840000 + 165649 = 7200^2 + 407^2 .

It is a cyclic number.

It is not a de Polignac number, because 52005649 - 2⁷ = 52005521 is a prime.

It is a super-2 number, since 2×52005649² = 5409175055822402, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 52005649.

It is not a weakly prime, because it can be changed into another prime (52005689) 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, 26002824 + 26002825.

It is an arithmetic number, because the mean of its divisors is an integer number (26002825).

Almost surely, 2^52005649 is an apocalyptic number.

It is an amenable number.

52005649 is a deficient number, since it is larger than the sum of its proper divisors (1).

52005649 is an equidigital number, since it uses as much as digits as its factorization.

52005649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 52005649 is about 7211.4942279669. The cubic root of 52005649 is about 373.2646311895.

The spelling of 52005649 in words is "fifty-two million, five thousand, six hundred forty-nine".