5181979 has 4 divisors (see below), whose sum is σ = 5653080. Its totient is φ = 4710880.

The previous prime is 5181977. The next prime is 5181983. The reversal of 5181979 is 9791815.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5181979 - 2¹ = 5181977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5181971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235534 + ... + 235555.

It is an arithmetic number, because the mean of its divisors is an integer number (1413270).

Almost surely, 2^5181979 is an apocalyptic number.

5181979 is a deficient number, since it is larger than the sum of its proper divisors (471101).

5181979 is a wasteful number, since it uses less digits than its factorization.

5181979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471100.

The product of its digits is 22680, while the sum is 40.

The square root of 5181979 is about 2276.3960551714. The cubic root of 5181979 is about 173.0474548779.

The spelling of 5181979 in words is "five million, one hundred eighty-one thousand, nine hundred seventy-nine".