84087901871 has 4 divisors (see below), whose sum is σ = 84088746144. Its totient is φ = 84087057600.

The previous prime is 84087901847. The next prime is 84087901913. The reversal of 84087901871 is 17810978048.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84087901871 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 (84087901841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249095 + ... + 479816.

It is an arithmetic number, because the mean of its divisors is an integer number (21022186536).

Almost surely, 2^84087901871 is an apocalyptic number.

84087901871 is a deficient number, since it is larger than the sum of its proper divisors (844273).

84087901871 is a wasteful number, since it uses less digits than its factorization.

84087901871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844272.

The product of its (nonzero) digits is 903168, while the sum is 53.

The spelling of 84087901871 in words is "eighty-four billion, eighty-seven million, nine hundred one thousand, eight hundred seventy-one".