87553921 has 8 divisors (see below), whose sum is σ = 107758784. Its totient is φ = 69273360.

The previous prime is 87553909. The next prime is 87553931. The reversal of 87553921 is 12935578.

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

It is not a de Polignac number, because 87553921 - 2⁷ = 87553793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87553931) 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, 480975 + ... + 481156.

It is an arithmetic number, because the mean of its divisors is an integer number (13469848).

Almost surely, 2^87553921 is an apocalyptic number.

It is an amenable number.

87553921 is a deficient number, since it is larger than the sum of its proper divisors (20204863).

87553921 is a wasteful number, since it uses less digits than its factorization.

87553921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962151.

The product of its digits is 75600, while the sum is 40.

The square root of 87553921 is about 9357.0252217251. The cubic root of 87553921 is about 444.0431758057.

The spelling of 87553921 in words is "eighty-seven million, five hundred fifty-three thousand, nine hundred twenty-one".