216869699 has 2 divisors, whose sum is σ = 216869700. Its totient is φ = 216869698.

The previous prime is 216869677. The next prime is 216869711. The reversal of 216869699 is 996968612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216869699 - 2¹² = 216865603 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (216809699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108434849 + 108434850.

It is an arithmetic number, because the mean of its divisors is an integer number (108434850).

Almost surely, 2^216869699 is an apocalyptic number.

216869699 is a deficient number, since it is larger than the sum of its proper divisors (1).

216869699 is an equidigital number, since it uses as much as digits as its factorization.

216869699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2519424, while the sum is 56.

The square root of 216869699 is about 14726.4964944144. The cubic root of 216869699 is about 600.8041984783.

The spelling of 216869699 in words is "two hundred sixteen million, eight hundred sixty-nine thousand, six hundred ninety-nine".