5259707821 has 4 divisors (see below), whose sum is σ = 5261200092. Its totient is φ = 5258215552.

The previous prime is 5259707801. The next prime is 5259707839. The reversal of 5259707821 is 1287079525.

It is a happy number.

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 1627234921 + 3632472900 = 40339^2 + 60270^2 .

It is a cyclic number.

It is not a de Polignac number, because 5259707821 - 2⁷ = 5259707693 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 (5259707801) 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, 740836 + ... + 747901.

It is an arithmetic number, because the mean of its divisors is an integer number (1315300023).

Almost surely, 2^5259707821 is an apocalyptic number.

It is an amenable number.

5259707821 is a deficient number, since it is larger than the sum of its proper divisors (1492271).

5259707821 is a wasteful number, since it uses less digits than its factorization.

5259707821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1492270.

The product of its (nonzero) digits is 352800, while the sum is 46.

The square root of 5259707821 is about 72523.8431207282. The cubic root of 5259707821 is about 1739.0839213838.

The spelling of 5259707821 in words is "five billion, two hundred fifty-nine million, seven hundred seven thousand, eight hundred twenty-one".