53839979 has 6 divisors (see below), whose sum is σ = 55761420. Its totient is φ = 51982616.

The previous prime is 53839943. The next prime is 53839991. The reversal of 53839979 is 97993835.

53839979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-53839979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53839979.

It is not an unprimeable number, because it can be changed into a prime (53839579) 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 5 ways as a sum of consecutive naturals, for example, 31169 + ... + 32850.

It is an arithmetic number, because the mean of its divisors is an integer number (9293570).

Almost surely, 2^53839979 is an apocalyptic number.

53839979 is a deficient number, since it is larger than the sum of its proper divisors (1921441).

53839979 is an equidigital number, since it uses as much as digits as its factorization.

53839979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64077 (or 64048 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 53.

The square root of 53839979 is about 7337.5731001469. The cubic root of 53839979 is about 377.6025866245.

The spelling of 53839979 in words is "fifty-three million, eight hundred thirty-nine thousand, nine hundred seventy-nine".