53989939 has 2 divisors, whose sum is σ = 53989940. Its totient is φ = 53989938.

The previous prime is 53989937. The next prime is 53989961. The reversal of 53989939 is 93998935.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53989939 - 2¹ = 53989937 is a prime.

Together with 53989937, 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 53989939.

It is not a weakly prime, because it can be changed into another prime (53989937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26994969 + 26994970.

It is an arithmetic number, because the mean of its divisors is an integer number (26994970).

Almost surely, 2^53989939 is an apocalyptic number.

53989939 is a deficient number, since it is larger than the sum of its proper divisors (1).

53989939 is an equidigital number, since it uses as much as digits as its factorization.

53989939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2361960, while the sum is 55.

The square root of 53989939 is about 7347.7846321187. The cubic root of 53989939 is about 377.9528393147.

The spelling of 53989939 in words is "fifty-three million, nine hundred eighty-nine thousand, nine hundred thirty-nine".