87212773 has 8 divisors (see below), whose sum is σ = 90604800. Its totient is φ = 83846448.

The previous prime is 87212707. The next prime is 87212789. The reversal of 87212773 is 37721278.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87212773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87212273) 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 7 ways as a sum of consecutive naturals, for example, 640 + ... + 13222.

It is an arithmetic number, because the mean of its divisors is an integer number (11325600).

Almost surely, 2^87212773 is an apocalyptic number.

It is an amenable number.

87212773 is a deficient number, since it is larger than the sum of its proper divisors (3392027).

87212773 is a wasteful number, since it uses less digits than its factorization.

87212773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12851.

The product of its digits is 32928, while the sum is 37.

The square root of 87212773 is about 9338.7779179077. Note that the first 3 decimals coincide. The cubic root of 87212773 is about 443.4656969359.

The spelling of 87212773 in words is "eighty-seven million, two hundred twelve thousand, seven hundred seventy-three".