218396969 has 12 divisors (see below), whose sum is σ = 254448000. Its totient is φ = 186906888.

The previous prime is 218396933. The next prime is 218396989. The reversal of 218396969 is 969693812.

It is not a de Polignac number, because 218396969 - 2²⁰ = 217348393 is a prime.

It is a super-2 number, since 2×218396969² = 95394472136773922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 218396969.

It is not an unprimeable number, because it can be changed into a prime (218396989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32132 + ... + 38330.

It is an arithmetic number, because the mean of its divisors is an integer number (21204000).

Almost surely, 2^218396969 is an apocalyptic number.

It is an amenable number.

218396969 is a deficient number, since it is larger than the sum of its proper divisors (36051031).

218396969 is an equidigital number, since it uses as much as digits as its factorization.

218396969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6932 (or 6925 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 53.

The square root of 218396969 is about 14778.2600125996. The cubic root of 218396969 is about 602.2112563053.

The spelling of 218396969 in words is "two hundred eighteen million, three hundred ninety-six thousand, nine hundred sixty-nine".