5123905817 has 4 divisors (see below), whose sum is σ = 5262389796. Its totient is φ = 4985421840.

The previous prime is 5123905763. The next prime is 5123905823. The reversal of 5123905817 is 7185093215.

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 3981736201 + 1142169616 = 63101^2 + 33796^2 .

It is a cyclic number.

It is not a de Polignac number, because 5123905817 - 2³² = 828938521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5123905847) 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, 69241934 + ... + 69242007.

It is an arithmetic number, because the mean of its divisors is an integer number (1315597449).

Almost surely, 2^5123905817 is an apocalyptic number.

It is an amenable number.

5123905817 is a deficient number, since it is larger than the sum of its proper divisors (138483979).

5123905817 is a wasteful number, since it uses less digits than its factorization.

5123905817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138483978.

The product of its (nonzero) digits is 75600, while the sum is 41.

The square root of 5123905817 is about 71581.4628028793. The cubic root of 5123905817 is about 1723.9859128995.

The spelling of 5123905817 in words is "five billion, one hundred twenty-three million, nine hundred five thousand, eight hundred seventeen".