53986779 has 72 divisors (see below), whose sum is σ = 102435840. Its totient is φ = 27064800.

The previous prime is 53986763. The next prime is 53986817. The reversal of 53986779 is 97768935.

It is not a de Polignac number, because 53986779 - 2⁴ = 53986763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53986379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 150202 + ... + 150560.

It is an arithmetic number, because the mean of its divisors is an integer number (1422720).

Almost surely, 2^53986779 is an apocalyptic number.

53986779 is a deficient number, since it is larger than the sum of its proper divisors (48449061).

53986779 is a wasteful number, since it uses less digits than its factorization.

53986779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421 (or 411 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 54.

The square root of 53986779 is about 7347.5695981733. The cubic root of 53986779 is about 377.9454653836.

The spelling of 53986779 in words is "fifty-three million, nine hundred eighty-six thousand, seven hundred seventy-nine".