87212879 has 8 divisors (see below), whose sum is σ = 94057152. Its totient is φ = 80388000.

The previous prime is 87212861. The next prime is 87212887. The reversal of 87212879 is 97821278.

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

It is a cyclic number.

It is not a de Polignac number, because 87212879 - 2¹² = 87208783 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 (87212809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5297 + ... + 14229.

It is an arithmetic number, because the mean of its divisors is an integer number (11757144).

Almost surely, 2^87212879 is an apocalyptic number.

87212879 is a deficient number, since it is larger than the sum of its proper divisors (6844273).

87212879 is a wasteful number, since it uses less digits than its factorization.

87212879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9697.

The product of its digits is 112896, while the sum is 44.

The square root of 87212879 is about 9338.7835931667. The cubic root of 87212879 is about 443.4658766013.

The spelling of 87212879 in words is "eighty-seven million, two hundred twelve thousand, eight hundred seventy-nine".