869784381 has 12 divisors (see below), whose sum is σ = 1256984352. Its totient is φ = 579565896.

The previous prime is 869784359. The next prime is 869784401. The reversal of 869784381 is 183487968.

It is not a de Polignac number, because 869784381 - 2¹⁵ = 869751613 is a prime.

It is a super-2 number, since 2×869784381² = 1513049738863106322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869784341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4371 + ... + 41936.

It is an arithmetic number, because the mean of its divisors is an integer number (104748696).

Almost surely, 2^869784381 is an apocalyptic number.

It is an amenable number.

869784381 is a deficient number, since it is larger than the sum of its proper divisors (387199971).

869784381 is a wasteful number, since it uses less digits than its factorization.

869784381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48400 (or 48397 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 869784381 is about 29492.1070966454. The cubic root of 869784381 is about 954.5613990633.

The spelling of 869784381 in words is "eight hundred sixty-nine million, seven hundred eighty-four thousand, three hundred eighty-one".