5128913 has 4 divisors (see below), whose sum is σ = 5151540. Its totient is φ = 5106288.

The previous prime is 5128909. The next prime is 5128943. The reversal of 5128913 is 3198215.

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 4870849 + 258064 = 2207^2 + 508^2 .

It is a cyclic number.

It is not a de Polignac number, because 5128913 - 2² = 5128909 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5128943) 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, 10970 + ... + 11427.

It is an arithmetic number, because the mean of its divisors is an integer number (1287885).

Almost surely, 2^5128913 is an apocalyptic number.

It is an amenable number.

5128913 is a deficient number, since it is larger than the sum of its proper divisors (22627).

5128913 is a wasteful number, since it uses less digits than its factorization.

5128913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22626.

The product of its digits is 2160, while the sum is 29.

The square root of 5128913 is about 2264.7103567565. The cubic root of 5128913 is about 172.4547301217.

It can be divided in two parts, 5128 and 913, that multiplied together give a palindrome (4681864).

The spelling of 5128913 in words is "five million, one hundred twenty-eight thousand, nine hundred thirteen".