5403870821 has 4 divisors (see below), whose sum is σ = 5406254700. Its totient is φ = 5401486944.

The previous prime is 5403870779. The next prime is 5403870853. The reversal of 5403870821 is 1280783045.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1456261921 + 3947608900 = 38161^2 + 62830^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5403870821 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 (5403870221) 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, 1188536 + ... + 1193073.

It is an arithmetic number, because the mean of its divisors is an integer number (1351563675).

Almost surely, 2^5403870821 is an apocalyptic number.

It is an amenable number.

5403870821 is a deficient number, since it is larger than the sum of its proper divisors (2383879).

5403870821 is a wasteful number, since it uses less digits than its factorization.

5403870821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2383878.

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 5403870821 is about 73511.0251662973. The cubic root of 5403870821 is about 1754.8297409255.

The spelling of 5403870821 in words is "five billion, four hundred three million, eight hundred seventy thousand, eight hundred twenty-one".