216964903 has 2 divisors, whose sum is σ = 216964904. Its totient is φ = 216964902.

The previous prime is 216964883. The next prime is 216964927. The reversal of 216964903 is 309469612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216964903 - 2⁵ = 216964871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216964403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108482451 + 108482452.

It is an arithmetic number, because the mean of its divisors is an integer number (108482452).

Almost surely, 2^216964903 is an apocalyptic number.

216964903 is a deficient number, since it is larger than the sum of its proper divisors (1).

216964903 is an equidigital number, since it uses as much as digits as its factorization.

216964903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 216964903 is about 14729.7285446813. The cubic root of 216964903 is about 600.8921016374.

The spelling of 216964903 in words is "two hundred sixteen million, nine hundred sixty-four thousand, nine hundred three".