54809869 has 4 divisors (see below), whose sum is σ = 54873244. Its totient is φ = 54746496.

The previous prime is 54809861. The next prime is 54809873. The reversal of 54809869 is 96890845.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96890845 = 5 ⋅19378169.

It can be written as a sum of positive squares in 2 ways, for example, as 33988900 + 20820969 = 5830^2 + 4563^2 .

It is a cyclic number.

It is not a de Polignac number, because 54809869 - 2³ = 54809861 is a prime.

It is a super-2 number, since 2×54809869² = 6008243479594322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54809861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30372 + ... + 32125.

It is an arithmetic number, because the mean of its divisors is an integer number (13718311).

Almost surely, 2^54809869 is an apocalyptic number.

It is an amenable number.

54809869 is a deficient number, since it is larger than the sum of its proper divisors (63375).

54809869 is an equidigital number, since it uses as much as digits as its factorization.

54809869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63374.

The product of its (nonzero) digits is 622080, while the sum is 49.

The square root of 54809869 is about 7403.3687602334. The cubic root of 54809869 is about 379.8565224726.

The spelling of 54809869 in words is "fifty-four million, eight hundred nine thousand, eight hundred sixty-nine".