53775787 has 4 divisors (see below), whose sum is σ = 57912400. Its totient is φ = 49639176.

The previous prime is 53775779. The next prime is 53775803. The reversal of 53775787 is 78757735.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 53775787 - 2³ = 53775779 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53775787.

It is not an unprimeable number, because it can be changed into a prime (53775707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2068287 + ... + 2068312.

It is an arithmetic number, because the mean of its divisors is an integer number (14478100).

Almost surely, 2^53775787 is an apocalyptic number.

53775787 is a deficient number, since it is larger than the sum of its proper divisors (4136613).

53775787 is a wasteful number, since it uses less digits than its factorization.

53775787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4136612.

The product of its digits is 1440600, while the sum is 49.

The square root of 53775787 is about 7333.1975972286. The cubic root of 53775787 is about 377.4524583785.

The spelling of 53775787 in words is "fifty-three million, seven hundred seventy-five thousand, seven hundred eighty-seven".