87726561 has 8 divisors (see below), whose sum is σ = 125966400. Its totient is φ = 53985552.

The previous prime is 87726557. The next prime is 87726589. The reversal of 87726561 is 16562778.

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

It is not a de Polignac number, because 87726561 - 2² = 87726557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87726521) 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, 1124661 + ... + 1124738.

It is an arithmetic number, because the mean of its divisors is an integer number (15745800).

Almost surely, 2^87726561 is an apocalyptic number.

It is an amenable number.

87726561 is a deficient number, since it is larger than the sum of its proper divisors (38239839).

87726561 is a wasteful number, since it uses less digits than its factorization.

87726561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2249415.

The product of its digits is 141120, while the sum is 42.

The square root of 87726561 is about 9366.2458327763. The cubic root of 87726561 is about 444.3348409569.

The spelling of 87726561 in words is "eighty-seven million, seven hundred twenty-six thousand, five hundred sixty-one".