216940703 has 4 divisors (see below), whose sum is σ = 247932240. Its totient is φ = 185949168.

The previous prime is 216940693. The next prime is 216940709. The reversal of 216940703 is 307049612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 216940703 - 2⁴ = 216940687 is a prime.

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 216940703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216940709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15495758 + ... + 15495771.

It is an arithmetic number, because the mean of its divisors is an integer number (61983060).

Almost surely, 2^216940703 is an apocalyptic number.

216940703 is a deficient number, since it is larger than the sum of its proper divisors (30991537).

216940703 is an equidigital number, since it uses as much as digits as its factorization.

216940703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30991536.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 216940703 is about 14728.9070538177. The cubic root of 216940703 is about 600.8697598833.

The spelling of 216940703 in words is "two hundred sixteen million, nine hundred forty thousand, seven hundred three".