87441779 has 4 divisors (see below), whose sum is σ = 87602184. Its totient is φ = 87281376.

The previous prime is 87441763. The next prime is 87441803. The reversal of 87441779 is 97714478.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97714478 = 2 ⋅48857239.

It is a cyclic number.

It is not a de Polignac number, because 87441779 - 2⁴ = 87441763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87441709) 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, 79382 + ... + 80475.

It is an arithmetic number, because the mean of its divisors is an integer number (21900546).

Almost surely, 2^87441779 is an apocalyptic number.

87441779 is a deficient number, since it is larger than the sum of its proper divisors (160405).

87441779 is a wasteful number, since it uses less digits than its factorization.

87441779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160404.

The product of its digits is 395136, while the sum is 47.

The square root of 87441779 is about 9351.0309057344. The cubic root of 87441779 is about 443.8535130071.

The spelling of 87441779 in words is "eighty-seven million, four hundred forty-one thousand, seven hundred seventy-nine".