87618421 has 8 divisors (see below), whose sum is σ = 95810688. Its totient is φ = 79464000.

The previous prime is 87618413. The next prime is 87618437. The reversal of 87618421 is 12481678.

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

It is not a de Polignac number, because 87618421 - 2³ = 87618413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87615421) 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, 4500 + ... + 13981.

It is an arithmetic number, because the mean of its divisors is an integer number (11976336).

Almost surely, 2^87618421 is an apocalyptic number.

It is an amenable number.

87618421 is a deficient number, since it is larger than the sum of its proper divisors (8192267).

87618421 is a wasteful number, since it uses less digits than its factorization.

87618421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18923.

The product of its digits is 21504, while the sum is 37.

The square root of 87618421 is about 9360.4711954046. The cubic root of 87618421 is about 444.1521895969.

The spelling of 87618421 in words is "eighty-seven million, six hundred eighteen thousand, four hundred twenty-one".