53818389 has 12 divisors (see below), whose sum is σ = 78612300. Its totient is φ = 35475264.

The previous prime is 53818381. The next prime is 53818399. The reversal of 53818389 is 98381835.

It can be written as a sum of positive squares in 2 ways, for example, as 33837489 + 19980900 = 5817^2 + 4470^2 .

It is not a de Polignac number, because 53818389 - 2³ = 53818381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53818381) 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, 32794 + ... + 34395.

It is an arithmetic number, because the mean of its divisors is an integer number (6551025).

Almost surely, 2^53818389 is an apocalyptic number.

It is an amenable number.

53818389 is a deficient number, since it is larger than the sum of its proper divisors (24793911).

53818389 is a wasteful number, since it uses less digits than its factorization.

53818389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67284 (or 67281 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 53818389 is about 7336.1017577457. The cubic root of 53818389 is about 377.5521066035.

The spelling of 53818389 in words is "fifty-three million, eight hundred eighteen thousand, three hundred eighty-nine".