864842101 has 4 divisors (see below), whose sum is σ = 884954752. Its totient is φ = 844729452.

The previous prime is 864842063. The next prime is 864842137. The reversal of 864842101 is 101248468.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 864842101 - 2¹³ = 864833909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864842141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10056261 + ... + 10056346.

It is an arithmetic number, because the mean of its divisors is an integer number (221238688).

Almost surely, 2^864842101 is an apocalyptic number.

It is an amenable number.

864842101 is a deficient number, since it is larger than the sum of its proper divisors (20112651).

864842101 is a wasteful number, since it uses less digits than its factorization.

864842101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20112650.

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 864842101 is about 29408.1978536598. The cubic root of 864842101 is about 952.7499640416.

The spelling of 864842101 in words is "eight hundred sixty-four million, eight hundred forty-two thousand, one hundred one".