869219387 has 2 divisors, whose sum is σ = 869219388. Its totient is φ = 869219386.

The previous prime is 869219359. The next prime is 869219399. The reversal of 869219387 is 783912968.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-869219387 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (869219327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434609693 + 434609694.

It is an arithmetic number, because the mean of its divisors is an integer number (434609694).

Almost surely, 2^869219387 is an apocalyptic number.

869219387 is a deficient number, since it is larger than the sum of its proper divisors (1).

869219387 is an equidigital number, since it uses as much as digits as its factorization.

869219387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 53.

The square root of 869219387 is about 29482.5268082639. The cubic root of 869219387 is about 954.3546664928.

The spelling of 869219387 in words is "eight hundred sixty-nine million, two hundred nineteen thousand, three hundred eighty-seven".