53438823 has 12 divisors (see below), whose sum is σ = 79679808. Its totient is φ = 34476480.

The previous prime is 53438813. The next prime is 53438873. The reversal of 53438823 is 32883435.

It is not a de Polignac number, because 53438823 - 2¹⁰ = 53437799 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53438813) 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, 95490 + ... + 96047.

It is an arithmetic number, because the mean of its divisors is an integer number (6639984).

Almost surely, 2^53438823 is an apocalyptic number.

53438823 is a deficient number, since it is larger than the sum of its proper divisors (26240985).

53438823 is a wasteful number, since it uses less digits than its factorization.

53438823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191574 (or 191571 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 53438823 is about 7310.1862493373. The cubic root of 53438823 is about 376.6624220508.

The spelling of 53438823 in words is "fifty-three million, four hundred thirty-eight thousand, eight hundred twenty-three".