5278390709 has 4 divisors (see below), whose sum is σ = 5313816300. Its totient is φ = 5242965120.

The previous prime is 5278390699. The next prime is 5278390751. The reversal of 5278390709 is 9070938725.

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 1705937809 + 3572452900 = 41303^2 + 59770^2 .

It is a cyclic number.

It is not a de Polignac number, because 5278390709 - 2¹² = 5278386613 is a prime.

It is a super-2 number, since 2×5278390709² = 55722816953715045362, 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 (5278390759) 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, 17712572 + ... + 17712869.

It is an arithmetic number, because the mean of its divisors is an integer number (1328454075).

Almost surely, 2^5278390709 is an apocalyptic number.

It is an amenable number.

5278390709 is a deficient number, since it is larger than the sum of its proper divisors (35425591).

5278390709 is a wasteful number, since it uses less digits than its factorization.

5278390709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35425590.

The product of its (nonzero) digits is 952560, while the sum is 50.

The square root of 5278390709 is about 72652.5340851921. The cubic root of 5278390709 is about 1741.1406082225.

The spelling of 5278390709 in words is "five billion, two hundred seventy-eight million, three hundred ninety thousand, seven hundred nine".