87781283 has 4 divisors (see below), whose sum is σ = 88362768. Its totient is φ = 87199800.

The previous prime is 87781277. The next prime is 87781301. The reversal of 87781283 is 38218778.

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 87781283 - 2¹⁴ = 87764899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87781483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290516 + ... + 290817.

It is an arithmetic number, because the mean of its divisors is an integer number (22090692).

Almost surely, 2^87781283 is an apocalyptic number.

87781283 is a deficient number, since it is larger than the sum of its proper divisors (581485).

87781283 is a wasteful number, since it uses less digits than its factorization.

87781283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581484.

The product of its digits is 150528, while the sum is 44.

The square root of 87781283 is about 9369.1666118177. The cubic root of 87781283 is about 444.4272106905.

The spelling of 87781283 in words is "eighty-seven million, seven hundred eighty-one thousand, two hundred eighty-three".