54809823 has 4 divisors (see below), whose sum is σ = 73079768. Its totient is φ = 36539880.

The previous prime is 54809789. The next prime is 54809827. The reversal of 54809823 is 32890845.

It is a happy number.

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

It is not a de Polignac number, because 54809823 - 2¹³ = 54801631 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 (54809827) 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, 9134968 + ... + 9134973.

It is an arithmetic number, because the mean of its divisors is an integer number (18269942).

Almost surely, 2^54809823 is an apocalyptic number.

54809823 is a deficient number, since it is larger than the sum of its proper divisors (18269945).

54809823 is a wasteful number, since it uses less digits than its factorization.

54809823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18269944.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 54809823 is about 7403.3656535389. The cubic root of 54809823 is about 379.8564162058.

The spelling of 54809823 in words is "fifty-four million, eight hundred nine thousand, eight hundred twenty-three".