216968694 has 16 divisors (see below), whose sum is σ = 434170368. Its totient is φ = 72284072.

The previous prime is 216968677. The next prime is 216968707. The reversal of 216968694 is 496869612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3859 + ... + 21185.

It is an arithmetic number, because the mean of its divisors is an integer number (27135648).

Almost surely, 2^216968694 is an apocalyptic number.

216968694 is an abundant number, since it is smaller than the sum of its proper divisors (217201674).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216968694 is a wasteful number, since it uses less digits than its factorization.

216968694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19419.

The product of its digits is 1119744, while the sum is 51.

The square root of 216968694 is about 14729.8572294507. The cubic root of 216968694 is about 600.8956013873.

The spelling of 216968694 in words is "two hundred sixteen million, nine hundred sixty-eight thousand, six hundred ninety-four".