87771313 has 16 divisors (see below), whose sum is σ = 104158080. Its totient is φ = 72366336.

The previous prime is 87771293. The next prime is 87771319. The reversal of 87771313 is 31317778.

It is a de Polignac number, because none of the positive numbers 2^k-87771313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87771319) 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 15 ways as a sum of consecutive naturals, for example, 67770 + ... + 69052.

It is an arithmetic number, because the mean of its divisors is an integer number (6509880).

Almost surely, 2^87771313 is an apocalyptic number.

It is an amenable number.

87771313 is a deficient number, since it is larger than the sum of its proper divisors (16386767).

87771313 is a wasteful number, since it uses less digits than its factorization.

87771313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656.

The product of its digits is 24696, while the sum is 37.

The square root of 87771313 is about 9368.6345323105. The cubic root of 87771313 is about 444.4103843737.

The spelling of 87771313 in words is "eighty-seven million, seven hundred seventy-one thousand, three hundred thirteen".