868051421 has 4 divisors (see below), whose sum is σ = 868111200. Its totient is φ = 867991644.

The previous prime is 868051369. The next prime is 868051439. The reversal of 868051421 is 124150868.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-868051421 is a prime.

It is a Duffinian 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 (868051021) 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, 7400 + ... + 42318.

It is an arithmetic number, because the mean of its divisors is an integer number (217027800).

Almost surely, 2^868051421 is an apocalyptic number.

It is an amenable number.

868051421 is a deficient number, since it is larger than the sum of its proper divisors (59779).

868051421 is a wasteful number, since it uses less digits than its factorization.

868051421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59778.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 868051421 is about 29462.7123836214. The cubic root of 868051421 is about 953.9270209356.

The spelling of 868051421 in words is "eight hundred sixty-eight million, fifty-one thousand, four hundred twenty-one".