216929349 has 24 divisors (see below), whose sum is σ = 385653632. Its totient is φ = 114423840.

The previous prime is 216929287. The next prime is 216929369. The reversal of 216929349 is 943929612.

It is a happy number.

216929349 is a `hidden beast` number, since 216 + 92 + 9 + 349 = 666.

It is not a de Polignac number, because 216929349 - 2⁸ = 216929093 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216929369) 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 23 ways as a sum of consecutive naturals, for example, 131617 + ... + 133254.

Almost surely, 2^216929349 is an apocalyptic number.

It is an amenable number.

216929349 is a deficient number, since it is larger than the sum of its proper divisors (168724283).

216929349 is a wasteful number, since it uses less digits than its factorization.

216929349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264897 (or 264894 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 216929349 is about 14728.5216162383. The cubic root of 216929349 is about 600.8592771505.

The spelling of 216929349 in words is "two hundred sixteen million, nine hundred twenty-nine thousand, three hundred forty-nine".