87221774 has 8 divisors (see below), whose sum is σ = 130912320. Its totient is φ = 43584336.

The previous prime is 87221753. The next prime is 87221777. The reversal of 87221774 is 47712278.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87221777) 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, 8879 + ... + 15914.

It is an arithmetic number, because the mean of its divisors is an integer number (16364040).

Almost surely, 2^87221774 is an apocalyptic number.

87221774 is a deficient number, since it is larger than the sum of its proper divisors (43690546).

87221774 is a wasteful number, since it uses less digits than its factorization.

87221774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26554.

The product of its digits is 43904, while the sum is 38.

The square root of 87221774 is about 9339.2598207781. The cubic root of 87221774 is about 443.4809527190.

The spelling of 87221774 in words is "eighty-seven million, two hundred twenty-one thousand, seven hundred seventy-four".