869601381 has 16 divisors (see below), whose sum is σ = 1266477120. Its totient is φ = 526363520.

The previous prime is 869601377. The next prime is 869601389. The reversal of 869601381 is 183106968.

It is a cyclic number.

It is not a de Polignac number, because 869601381 - 2² = 869601377 is a prime.

It is a super-2 number, since 2×869601381² = 1512413123674214322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869601389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10411 + ... + 42983.

It is an arithmetic number, because the mean of its divisors is an integer number (79154820).

Almost surely, 2^869601381 is an apocalyptic number.

It is an amenable number.

869601381 is a deficient number, since it is larger than the sum of its proper divisors (396875739).

869601381 is a wasteful number, since it uses less digits than its factorization.

869601381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33396.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 869601381 is about 29489.0044084232. The cubic root of 869601381 is about 954.4944487584.

The spelling of 869601381 in words is "eight hundred sixty-nine million, six hundred one thousand, three hundred eighty-one".