216460789 has 2 divisors, whose sum is σ = 216460790. Its totient is φ = 216460788.

The previous prime is 216460759. The next prime is 216460801. The reversal of 216460789 is 987064612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 181117764 + 35343025 = 13458^2 + 5945^2 .

It is a cyclic number.

It is not a de Polignac number, because 216460789 - 2⁷ = 216460661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216460759) by changing a digit.

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 as a sum of consecutive naturals, namely, 108230394 + 108230395.

It is an arithmetic number, because the mean of its divisors is an integer number (108230395).

Almost surely, 2^216460789 is an apocalyptic number.

It is an amenable number.

216460789 is a deficient number, since it is larger than the sum of its proper divisors (1).

216460789 is an equidigital number, since it uses as much as digits as its factorization.

216460789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 216460789 is about 14712.6064652053. The cubic root of 216460789 is about 600.4263534476.

The spelling of 216460789 in words is "two hundred sixteen million, four hundred sixty thousand, seven hundred eighty-nine".