5178891 has 16 divisors (see below), whose sum is σ = 7188480. Its totient is φ = 3312960.

The previous prime is 5178889. The next prime is 5178893. The reversal of 5178891 is 1988715.

It is an interprime number because it is at equal distance from previous prime (5178889) and next prime (5178893).

It is not a de Polignac number, because 5178891 - 2¹ = 5178889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5178893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21550 + ... + 21788.

It is an arithmetic number, because the mean of its divisors is an integer number (449280).

Almost surely, 2^5178891 is an apocalyptic number.

5178891 is a deficient number, since it is larger than the sum of its proper divisors (2009589).

5178891 is a wasteful number, since it uses less digits than its factorization.

5178891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506.

The product of its digits is 20160, while the sum is 39.

The square root of 5178891 is about 2275.7176889940. The cubic root of 5178891 is about 173.0130744014.

The spelling of 5178891 in words is "five million, one hundred seventy-eight thousand, eight hundred ninety-one".