5477821 has 2 divisors, whose sum is σ = 5477822. Its totient is φ = 5477820.

The previous prime is 5477819. The next prime is 5477837. The reversal of 5477821 is 1287745.

It is a happy number.

5477821 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4575321 + 902500 = 2139^2 + 950^2 .

It is a cyclic number.

It is not a de Polignac number, because 5477821 - 2¹ = 5477819 is a prime.

Together with 5477819, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5447821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2738910 + 2738911.

It is an arithmetic number, because the mean of its divisors is an integer number (2738911).

Almost surely, 2^5477821 is an apocalyptic number.

It is an amenable number.

5477821 is a deficient number, since it is larger than the sum of its proper divisors (1).

5477821 is an equidigital number, since it uses as much as digits as its factorization.

5477821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15680, while the sum is 34.

The square root of 5477821 is about 2340.4745245356. The cubic root of 5477821 is about 176.2798256116.

The spelling of 5477821 in words is "five million, four hundred seventy-seven thousand, eight hundred twenty-one".