216920707 has 2 divisors, whose sum is σ = 216920708. Its totient is φ = 216920706.

The previous prime is 216920657. The next prime is 216920719. The reversal of 216920707 is 707029612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216920707 - 2²⁷ = 82702979 is a prime.

It is not a weakly prime, because it can be changed into another prime (216920747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108460353 + 108460354.

It is an arithmetic number, because the mean of its divisors is an integer number (108460354).

Almost surely, 2^216920707 is an apocalyptic number.

216920707 is a deficient number, since it is larger than the sum of its proper divisors (1).

216920707 is an equidigital number, since it uses as much as digits as its factorization.

216920707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 216920707 is about 14728.2282369605. The cubic root of 216920707 is about 600.8512980629.

The spelling of 216920707 in words is "two hundred sixteen million, nine hundred twenty thousand, seven hundred seven".