87656722 has 4 divisors (see below), whose sum is σ = 131485086. Its totient is φ = 43828360.

The previous prime is 87656717. The next prime is 87656759. The reversal of 87656722 is 22765678.

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

It can be written as a sum of positive squares in only one way, i.e., 78481881 + 9174841 = 8859^2 + 3029^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21914179 + ... + 21914182.

Almost surely, 2^87656722 is an apocalyptic number.

87656722 is a deficient number, since it is larger than the sum of its proper divisors (43828364).

87656722 is a wasteful number, since it uses less digits than its factorization.

87656722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43828363.

The product of its digits is 282240, while the sum is 43.

The square root of 87656722 is about 9362.5168624681. The cubic root of 87656722 is about 444.2168981923.

The spelling of 87656722 in words is "eighty-seven million, six hundred fifty-six thousand, seven hundred twenty-two".