219834869 has 2 divisors, whose sum is σ = 219834870. Its totient is φ = 219834868.

The previous prime is 219834827. The next prime is 219834887. The reversal of 219834869 is 968438912.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 217916644 + 1918225 = 14762^2 + 1385^2 .

It is a cyclic number.

It is not a de Polignac number, because 219834869 - 2⁸ = 219834613 is a prime.

It is a super-2 number, since 2×219834869² = 96654739256494322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (219834889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109917434 + 109917435.

It is an arithmetic number, because the mean of its divisors is an integer number (109917435).

Almost surely, 2^219834869 is an apocalyptic number.

It is an amenable number.

219834869 is a deficient number, since it is larger than the sum of its proper divisors (1).

219834869 is an equidigital number, since it uses as much as digits as its factorization.

219834869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 50.

The square root of 219834869 is about 14826.8293643651. The cubic root of 219834869 is about 603.5299957840.

The spelling of 219834869 in words is "two hundred nineteen million, eight hundred thirty-four thousand, eight hundred sixty-nine".