87442871 has 4 divisors (see below), whose sum is σ = 88308744. Its totient is φ = 86577000.

The previous prime is 87442813. The next prime is 87442891. The reversal of 87442871 is 17824478.

It is a happy number.

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 87442871 - 2¹⁰ = 87441847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87442891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 432785 + ... + 432986.

It is an arithmetic number, because the mean of its divisors is an integer number (22077186).

Almost surely, 2^87442871 is an apocalyptic number.

87442871 is a deficient number, since it is larger than the sum of its proper divisors (865873).

87442871 is a wasteful number, since it uses less digits than its factorization.

87442871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865872.

The product of its digits is 100352, while the sum is 41.

The square root of 87442871 is about 9351.0892948362. The cubic root of 87442871 is about 443.8553606594.

The spelling of 87442871 in words is "eighty-seven million, four hundred forty-two thousand, eight hundred seventy-one".