87791583 has 8 divisors (see below), whose sum is σ = 127696896. Its totient is φ = 53207000.

The previous prime is 87791581. The next prime is 87791593. The reversal of 87791583 is 38519778.

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

It is not a de Polignac number, because 87791583 - 2¹ = 87791581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87791581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1330143 + ... + 1330208.

It is an arithmetic number, because the mean of its divisors is an integer number (15962112).

Almost surely, 2^87791583 is an apocalyptic number.

87791583 is a deficient number, since it is larger than the sum of its proper divisors (39905313).

87791583 is a wasteful number, since it uses less digits than its factorization.

87791583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2660365.

The product of its digits is 423360, while the sum is 48.

The square root of 87791583 is about 9369.7162710511. The cubic root of 87791583 is about 444.4445926087. Note that the first 3 decimals are identical.

The spelling of 87791583 in words is "eighty-seven million, seven hundred ninety-one thousand, five hundred eighty-three".