213198979 has 8 divisors (see below), whose sum is σ = 246022400. Its totient is φ = 180967176.

The previous prime is 213198941. The next prime is 213199001. The reversal of 213198979 is 979891312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213198979 - 2¹¹ = 213196931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213198929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147129 + ... + 148570.

It is an arithmetic number, because the mean of its divisors is an integer number (30752800).

Almost surely, 2^213198979 is an apocalyptic number.

213198979 is a deficient number, since it is larger than the sum of its proper divisors (32823421).

213198979 is a wasteful number, since it uses less digits than its factorization.

213198979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295809.

The product of its digits is 244944, while the sum is 49.

The square root of 213198979 is about 14601.3348362401. The cubic root of 213198979 is about 597.3951698350.

The spelling of 213198979 in words is "two hundred thirteen million, one hundred ninety-eight thousand, nine hundred seventy-nine".