87897121 has 8 divisors (see below), whose sum is σ = 97712384. Its totient is φ = 78518160.

The previous prime is 87897119. The next prime is 87897127. The reversal of 87897121 is 12179878.

It is a happy number.

87897121 is nontrivially palindromic in base 14.

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 87897121 - 2¹ = 87897119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87897127) 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, 108651 + ... + 109456.

It is an arithmetic number, because the mean of its divisors is an integer number (12214048).

Almost surely, 2^87897121 is an apocalyptic number.

It is an amenable number.

87897121 is a deficient number, since it is larger than the sum of its proper divisors (9815263).

87897121 is a wasteful number, since it uses less digits than its factorization.

87897121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218151.

The product of its digits is 56448, while the sum is 43.

The square root of 87897121 is about 9375.3464469320. The cubic root of 87897121 is about 444.6226165473.

The spelling of 87897121 in words is "eighty-seven million, eight hundred ninety-seven thousand, one hundred twenty-one".