216078673 has 2 divisors, whose sum is σ = 216078674. Its totient is φ = 216078672.

The previous prime is 216078647. The next prime is 216078677. The reversal of 216078673 is 376870612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123476544 + 92602129 = 11112^2 + 9623^2 .

It is a cyclic number.

It is not a de Polignac number, because 216078673 - 2⁵ = 216078641 is a prime.

It is not a weakly prime, because it can be changed into another prime (216078677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108039336 + 108039337.

It is an arithmetic number, because the mean of its divisors is an integer number (108039337).

Almost surely, 2^216078673 is an apocalyptic number.

It is an amenable number.

216078673 is a deficient number, since it is larger than the sum of its proper divisors (1).

216078673 is an equidigital number, since it uses as much as digits as its factorization.

216078673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 216078673 is about 14699.6147228422. The cubic root of 216078673 is about 600.0728365281.

The spelling of 216078673 in words is "two hundred sixteen million, seventy-eight thousand, six hundred seventy-three".