869998311 has 72 divisors (see below), whose sum is σ = 1593891936. Its totient is φ = 447482880.

The previous prime is 869998309. The next prime is 869998331. The reversal of 869998311 is 113899968.

It is not a de Polignac number, because 869998311 - 2¹ = 869998309 is a prime.

It is a super-2 number, since 2×869998311² = 1513794122285705442, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869998331) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 435531 + ... + 437523.

It is an arithmetic number, because the mean of its divisors is an integer number (22137388).

Almost surely, 2^869998311 is an apocalyptic number.

869998311 is a deficient number, since it is larger than the sum of its proper divisors (723893625).

869998311 is a wasteful number, since it uses less digits than its factorization.

869998311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2073 (or 2057 counting only the distinct ones).

The product of its digits is 839808, while the sum is 54.

The square root of 869998311 is about 29495.7337762599. The cubic root of 869998311 is about 954.6396531626.

The spelling of 869998311 in words is "eight hundred sixty-nine million, nine hundred ninety-eight thousand, three hundred eleven".