52991939 has 32 divisors (see below), whose sum is σ = 71801856. Its totient is φ = 37768320.

The previous prime is 52991899. The next prime is 52991947. The reversal of 52991939 is 93919925.

52991939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52991939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 52991893 and 52991902.

It is not an unprimeable number, because it can be changed into a prime (52990939) 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 in 31 ways as a sum of consecutive naturals, for example, 167009 + ... + 167325.

It is an arithmetic number, because the mean of its divisors is an integer number (2243808).

Almost surely, 2^52991939 is an apocalyptic number.

52991939 is a deficient number, since it is larger than the sum of its proper divisors (18809917).

52991939 is a wasteful number, since it uses less digits than its factorization.

52991939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515.

The product of its digits is 196830, while the sum is 47.

The square root of 52991939 is about 7279.5562364749. The cubic root of 52991939 is about 375.6095307965.

The spelling of 52991939 in words is "fifty-two million, nine hundred ninety-one thousand, nine hundred thirty-nine".