8687258421 has 4 divisors (see below), whose sum is σ = 11583011232. Its totient is φ = 5791505612.

The previous prime is 8687258407. The next prime is 8687258441. The reversal of 8687258421 is 1248527868.

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 8687258421 - 2¹¹ = 8687256373 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 (8687258441) 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, 1447876401 + ... + 1447876406.

It is an arithmetic number, because the mean of its divisors is an integer number (2895752808).

Almost surely, 2^8687258421 is an apocalyptic number.

It is an amenable number.

8687258421 is a deficient number, since it is larger than the sum of its proper divisors (2895752811).

8687258421 is a wasteful number, since it uses less digits than its factorization.

8687258421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2895752810.

The product of its digits is 1720320, while the sum is 51.

The square root of 8687258421 is about 93205.4634718373. The cubic root of 8687258421 is about 2055.7055745185.

The spelling of 8687258421 in words is "eight billion, six hundred eighty-seven million, two hundred fifty-eight thousand, four hundred twenty-one".