213979289 has 8 divisors (see below), whose sum is σ = 226990368. Its totient is φ = 201015360.

The previous prime is 213979247. The next prime is 213979291. The reversal of 213979289 is 982979312.

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 213979289 - 2¹⁶ = 213913753 is a prime.

It is a super-2 number, since 2×213979289² = 91574272241891042, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (213979219) 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, 2207 + ... + 20804.

It is an arithmetic number, because the mean of its divisors is an integer number (28373796).

Almost surely, 2^213979289 is an apocalyptic number.

It is an amenable number.

213979289 is a deficient number, since it is larger than the sum of its proper divisors (13011079).

213979289 is a wasteful number, since it uses less digits than its factorization.

213979289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23575.

The product of its digits is 489888, while the sum is 50.

The square root of 213979289 is about 14628.0309337928. The cubic root of 213979289 is about 598.1231062011.

The spelling of 213979289 in words is "two hundred thirteen million, nine hundred seventy-nine thousand, two hundred eighty-nine".