53009979 has 12 divisors (see below), whose sum is σ = 77690088. Its totient is φ = 32127040.

The previous prime is 53009977. The next prime is 53009987. The reversal of 53009979 is 97990035.

It is a happy number.

It is not a de Polignac number, because 53009979 - 2¹ = 53009977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53009979.

It is not an unprimeable number, because it can be changed into a prime (53009977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72654 + ... + 73379.

It is an arithmetic number, because the mean of its divisors is an integer number (6474174).

Almost surely, 2^53009979 is an apocalyptic number.

53009979 is a deficient number, since it is larger than the sum of its proper divisors (24680109).

53009979 is a wasteful number, since it uses less digits than its factorization.

53009979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146058 (or 146047 counting only the distinct ones).

The product of its (nonzero) digits is 76545, while the sum is 42.

The square root of 53009979 is about 7280.7952175569. The cubic root of 53009979 is about 375.6521487701.

The spelling of 53009979 in words is "fifty-three million, nine thousand, nine hundred seventy-nine".