878951421 has 24 divisors (see below), whose sum is σ = 1278935424. Its totient is φ = 581676480.

The previous prime is 878951413. The next prime is 878951431. The reversal of 878951421 is 124159878.

It is not a de Polignac number, because 878951421 - 2³ = 878951413 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878951431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 927670 + ... + 928616.

It is an arithmetic number, because the mean of its divisors is an integer number (53288976).

Almost surely, 2^878951421 is an apocalyptic number.

It is an amenable number.

878951421 is a deficient number, since it is larger than the sum of its proper divisors (399984003).

878951421 is a wasteful number, since it uses less digits than its factorization.

878951421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601 (or 1598 counting only the distinct ones).

The product of its digits is 161280, while the sum is 45.

The square root of 878951421 is about 29647.1148849260. The cubic root of 878951421 is about 957.9032002675.

The spelling of 878951421 in words is "eight hundred seventy-eight million, nine hundred fifty-one thousand, four hundred twenty-one".