87146771 has 4 divisors (see below), whose sum is σ = 89272344. Its totient is φ = 85021200.

The previous prime is 87146723. The next prime is 87146783. The reversal of 87146771 is 17764178.

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

It is a cyclic number.

It is not a de Polignac number, because 87146771 - 2¹⁸ = 86884627 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 2125531 = 87146771 / (8 + 7 + 1 + 4 + 6 + 7 + 7 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87146071) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 1062725 + ... + 1062806.

It is an arithmetic number, because the mean of its divisors is an integer number (22318086).

Almost surely, 2^87146771 is an apocalyptic number.

87146771 is a deficient number, since it is larger than the sum of its proper divisors (2125573).

87146771 is a wasteful number, since it uses less digits than its factorization.

87146771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2125572.

The product of its digits is 65856, while the sum is 41.

The square root of 87146771 is about 9335.2434890580. The cubic root of 87146771 is about 443.3537981520.

The spelling of 87146771 in words is "eighty-seven million, one hundred forty-six thousand, seven hundred seventy-one".