87870961797 has 16 divisors (see below), whose sum is σ = 123359900160. Its totient is φ = 55482944112.

The previous prime is 87870961747. The next prime is 87870961807. The reversal of 87870961797 is 79716907878.

It is not a de Polignac number, because 87870961797 - 2¹⁰ = 87870960773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87870961747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20658 + ... + 419724.

It is an arithmetic number, because the mean of its divisors is an integer number (7709993760).

Almost surely, 2^87870961797 is an apocalyptic number.

It is an amenable number.

87870961797 is a deficient number, since it is larger than the sum of its proper divisors (35488938363).

87870961797 is a wasteful number, since it uses less digits than its factorization.

87870961797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402952.

The product of its (nonzero) digits is 74680704, while the sum is 69.

It can be divided in two parts, 878709 and 61797, that added together give a triangular number (940506 = T₁₃₇₁).

The spelling of 87870961797 in words is "eighty-seven billion, eight hundred seventy million, nine hundred sixty-one thousand, seven hundred ninety-seven".