53878789 has 4 divisors (see below), whose sum is σ = 54222124. Its totient is φ = 53535456.

The previous prime is 53878757. The next prime is 53878801. The reversal of 53878789 is 98787835.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8208225 + 45670564 = 2865^2 + 6758^2 .

It is a cyclic number.

It is not a de Polignac number, because 53878789 - 2⁵ = 53878757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53878289) 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, 171432 + ... + 171745.

It is an arithmetic number, because the mean of its divisors is an integer number (13555531).

Almost surely, 2^53878789 is an apocalyptic number.

It is an amenable number.

53878789 is a deficient number, since it is larger than the sum of its proper divisors (343335).

53878789 is a wasteful number, since it uses less digits than its factorization.

53878789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343334.

The product of its digits is 3386880, while the sum is 55.

The square root of 53878789 is about 7340.2172311179. The cubic root of 53878789 is about 377.6932951576.

The spelling of 53878789 in words is "fifty-three million, eight hundred seventy-eight thousand, seven hundred eighty-nine".