87321477 has 4 divisors (see below), whose sum is σ = 116428640. Its totient is φ = 58214316.

The previous prime is 87321463. The next prime is 87321497. The reversal of 87321477 is 77412378.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 87321477 - 2⁶ = 87321413 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 (87321497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14553577 + ... + 14553582.

It is an arithmetic number, because the mean of its divisors is an integer number (29107160).

Almost surely, 2^87321477 is an apocalyptic number.

It is an amenable number.

87321477 is a deficient number, since it is larger than the sum of its proper divisors (29107163).

87321477 is a wasteful number, since it uses less digits than its factorization.

87321477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29107162.

The product of its digits is 65856, while the sum is 39.

The square root of 87321477 is about 9344.5961389458. The cubic root of 87321477 is about 443.6498690427.

Subtracting from 87321477 its reverse (77412378), we obtain a palindrome (9909099).

The spelling of 87321477 in words is "eighty-seven million, three hundred twenty-one thousand, four hundred seventy-seven".