87961839071 has 4 divisors (see below), whose sum is σ = 87986324112. Its totient is φ = 87937354032.

The previous prime is 87961839067. The next prime is 87961839083. The reversal of 87961839071 is 17093816978.

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 87961839071 - 2² = 87961839067 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87961839071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87961839001) 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, 12237131 + ... + 12244316.

It is an arithmetic number, because the mean of its divisors is an integer number (21996581028).

Almost surely, 2^87961839071 is an apocalyptic number.

87961839071 is a deficient number, since it is larger than the sum of its proper divisors (24485041).

87961839071 is a wasteful number, since it uses less digits than its factorization.

87961839071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24485040.

The product of its (nonzero) digits is 4572288, while the sum is 59.

The spelling of 87961839071 in words is "eighty-seven billion, nine hundred sixty-one million, eight hundred thirty-nine thousand, seventy-one".