877867921 has 8 divisors (see below), whose sum is σ = 1004652224. Its totient is φ = 751427280.

The previous prime is 877867901. The next prime is 877867973. The reversal of 877867921 is 129768778.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 877867921 - 2²³ = 869479313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (877867901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80415 + ... + 90676.

It is an arithmetic number, because the mean of its divisors is an integer number (125581528).

Almost surely, 2^877867921 is an apocalyptic number.

It is an amenable number.

877867921 is a deficient number, since it is larger than the sum of its proper divisors (126784303).

877867921 is a wasteful number, since it uses less digits than its factorization.

877867921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171831.

The product of its digits is 2370816, while the sum is 55.

The square root of 877867921 is about 29628.8359710604. The cubic root of 877867921 is about 957.5094299712.

The spelling of 877867921 in words is "eight hundred seventy-seven million, eight hundred sixty-seven thousand, nine hundred twenty-one".