52689649 has 2 divisors, whose sum is σ = 52689650. Its totient is φ = 52689648.

The previous prime is 52689631. The next prime is 52689653. The reversal of 52689649 is 94698625.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52664049 + 25600 = 7257^2 + 160^2 .

It is a cyclic number.

It is not a de Polignac number, because 52689649 - 2⁵ = 52689617 is a prime.

It is a super-2 number, since 2×52689649² = 5552398223486402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (52689629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26344824 + 26344825.

It is an arithmetic number, because the mean of its divisors is an integer number (26344825).

Almost surely, 2^52689649 is an apocalyptic number.

It is an amenable number.

52689649 is a deficient number, since it is larger than the sum of its proper divisors (1).

52689649 is an equidigital number, since it uses as much as digits as its factorization.

52689649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 49.

The square root of 52689649 is about 7258.7635999528. The cubic root of 52689649 is about 374.8939528283.

The spelling of 52689649 in words is "fifty-two million, six hundred eighty-nine thousand, six hundred forty-nine".