87773289 has 4 divisors (see below), whose sum is σ = 117031056. Its totient is φ = 58515524.

The previous prime is 87773281. The next prime is 87773291. The reversal of 87773289 is 98237778.

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 87773289 - 2³ = 87773281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87773281) 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, 14628879 + ... + 14628884.

It is an arithmetic number, because the mean of its divisors is an integer number (29257764).

Almost surely, 2^87773289 is an apocalyptic number.

It is an amenable number.

87773289 is a deficient number, since it is larger than the sum of its proper divisors (29257767).

87773289 is a wasteful number, since it uses less digits than its factorization.

87773289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29257766.

The product of its digits is 1185408, while the sum is 51.

The square root of 87773289 is about 9368.7399899880. The cubic root of 87773289 is about 444.4137193598.

The spelling of 87773289 in words is "eighty-seven million, seven hundred seventy-three thousand, two hundred eighty-nine".