213118979 has 4 divisors (see below), whose sum is σ = 213155376. Its totient is φ = 213082584.

The previous prime is 213118963. The next prime is 213119063. The reversal of 213118979 is 979811312.

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 213118979 - 2⁴ = 213118963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213118909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7199 + ... + 21864.

It is an arithmetic number, because the mean of its divisors is an integer number (53288844).

Almost surely, 2^213118979 is an apocalyptic number.

213118979 is a deficient number, since it is larger than the sum of its proper divisors (36397).

213118979 is an equidigital number, since it uses as much as digits as its factorization.

213118979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36396.

The product of its digits is 27216, while the sum is 41.

The square root of 213118979 is about 14598.5951036393. The cubic root of 213118979 is about 597.3204390322.

The spelling of 213118979 in words is "two hundred thirteen million, one hundred eighteen thousand, nine hundred seventy-nine".