52978909 has 2 divisors, whose sum is σ = 52978910. Its totient is φ = 52978908.

The previous prime is 52978879. The next prime is 52978943. The reversal of 52978909 is 90987925.

52978909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51408900 + 1570009 = 7170^2 + 1253^2 .

It is a cyclic number.

It is not a de Polignac number, because 52978909 - 2⁹ = 52978397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52978949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26489454 + 26489455.

It is an arithmetic number, because the mean of its divisors is an integer number (26489455).

Almost surely, 2^52978909 is an apocalyptic number.

It is an amenable number.

52978909 is a deficient number, since it is larger than the sum of its proper divisors (1).

52978909 is an equidigital number, since it uses as much as digits as its factorization.

52978909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 49.

The square root of 52978909 is about 7278.6612093159. The cubic root of 52978909 is about 375.5787425076.

The spelling of 52978909 in words is "fifty-two million, nine hundred seventy-eight thousand, nine hundred nine".