87771241 has 4 divisors (see below), whose sum is σ = 92390800. Its totient is φ = 83151684.

The previous prime is 87771191. The next prime is 87771247. The reversal of 87771241 is 14217778.

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 a cyclic number.

It is not a de Polignac number, because 87771241 - 2¹⁵ = 87738473 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87771241.

It is not an unprimeable number, because it can be changed into a prime (87771247) 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, 2309751 + ... + 2309788.

It is an arithmetic number, because the mean of its divisors is an integer number (23097700).

Almost surely, 2^87771241 is an apocalyptic number.

It is an amenable number.

87771241 is a deficient number, since it is larger than the sum of its proper divisors (4619559).

87771241 is a wasteful number, since it uses less digits than its factorization.

87771241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4619558.

The product of its digits is 21952, while the sum is 37.

The square root of 87771241 is about 9368.6306897006. The cubic root of 87771241 is about 444.4102628550.

The spelling of 87771241 in words is "eighty-seven million, seven hundred seventy-one thousand, two hundred forty-one".