87008421 has 16 divisors (see below), whose sum is σ = 120499200. Its totient is φ = 55803888.

The previous prime is 87008417. The next prime is 87008443. The reversal of 87008421 is 12480078.

It is not a de Polignac number, because 87008421 - 2² = 87008417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87008921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3090 + ... + 13548.

It is an arithmetic number, because the mean of its divisors is an integer number (7531200).

Almost surely, 2^87008421 is an apocalyptic number.

It is an amenable number.

87008421 is a deficient number, since it is larger than the sum of its proper divisors (33490779).

87008421 is a wasteful number, since it uses less digits than its factorization.

87008421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10568.

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 87008421 is about 9327.8304551487. The cubic root of 87008421 is about 443.1190582031.

Adding to 87008421 its reverse (12480078), we get a palindrome (99488499).

The spelling of 87008421 in words is "eighty-seven million, eight thousand, four hundred twenty-one".