53977865 has 4 divisors (see below), whose sum is σ = 64773444. Its totient is φ = 43182288.

The previous prime is 53977843. The next prime is 53977867. The reversal of 53977865 is 56877935.

It is a happy number.

53977865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56877935 = 5 ⋅11375587.

It can be written as a sum of positive squares in 2 ways, for example, as 30426256 + 23551609 = 5516^2 + 4853^2 .

It is a cyclic number.

It is not a de Polignac number, because 53977865 - 2¹⁸ = 53715721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53977867) 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 3 ways as a sum of consecutive naturals, for example, 5397782 + ... + 5397791.

It is an arithmetic number, because the mean of its divisors is an integer number (16193361).

Almost surely, 2^53977865 is an apocalyptic number.

It is an amenable number.

53977865 is a deficient number, since it is larger than the sum of its proper divisors (10795579).

53977865 is a wasteful number, since it uses less digits than its factorization.

53977865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10795578.

The product of its digits is 1587600, while the sum is 50.

The square root of 53977865 is about 7346.9629779930. The cubic root of 53977865 is about 377.9246628132.

The spelling of 53977865 in words is "fifty-three million, nine hundred seventy-seven thousand, eight hundred sixty-five".