869619899 has 2 divisors, whose sum is σ = 869619900. Its totient is φ = 869619898.

The previous prime is 869619889. The next prime is 869619937. The reversal of 869619899 is 998916968.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 869619899 - 2⁸ = 869619643 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (869619869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434809949 + 434809950.

It is an arithmetic number, because the mean of its divisors is an integer number (434809950).

Almost surely, 2^869619899 is an apocalyptic number.

869619899 is a deficient number, since it is larger than the sum of its proper divisors (1).

869619899 is an equidigital number, since it uses as much as digits as its factorization.

869619899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15116544, while the sum is 65.

The square root of 869619899 is about 29489.3183881893. The cubic root of 869619899 is about 954.5012239710.

The spelling of 869619899 in words is "eight hundred sixty-nine million, six hundred nineteen thousand, eight hundred ninety-nine".