87614321 has 4 divisors (see below), whose sum is σ = 88172532. Its totient is φ = 87056112.

The previous prime is 87614299. The next prime is 87614323. The reversal of 87614321 is 12341678.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 54390625 + 33223696 = 7375^2 + 5764^2 .

It is a cyclic number.

It is not a de Polignac number, because 87614321 - 2⁶ = 87614257 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87614323) 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, 278870 + ... + 279183.

It is an arithmetic number, because the mean of its divisors is an integer number (22043133).

Almost surely, 2^87614321 is an apocalyptic number.

It is an amenable number.

87614321 is a deficient number, since it is larger than the sum of its proper divisors (558211).

87614321 is a wasteful number, since it uses less digits than its factorization.

87614321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558210.

The product of its digits is 8064, while the sum is 32.

The square root of 87614321 is about 9360.2521867736. The cubic root of 87614321 is about 444.1452616307.

Adding to 87614321 its reverse (12341678), we get a palindrome (99955999).

The spelling of 87614321 in words is "eighty-seven million, six hundred fourteen thousand, three hundred twenty-one".