216628963 has 2 divisors, whose sum is σ = 216628964. Its totient is φ = 216628962.

The previous prime is 216628939. The next prime is 216629027. The reversal of 216628963 is 369826612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216628963 - 2⁵ = 216628931 is a prime.

It is a super-2 number, since 2×216628963² = 93856215220910738, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (216628933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108314481 + 108314482.

It is an arithmetic number, because the mean of its divisors is an integer number (108314482).

Almost surely, 2^216628963 is an apocalyptic number.

216628963 is a deficient number, since it is larger than the sum of its proper divisors (1).

216628963 is an equidigital number, since it uses as much as digits as its factorization.

216628963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 43.

The square root of 216628963 is about 14718.3206582816. The cubic root of 216628963 is about 600.5818087967.

It can be divided in two parts, 21662 and 8963, that added together give a square (30625 = 175²).

The spelling of 216628963 in words is "two hundred sixteen million, six hundred twenty-eight thousand, nine hundred sixty-three".