87586870278989 has 4 divisors (see below), whose sum is σ = 87597725023740. Its totient is φ = 87576015534240.

The previous prime is 87586870278983. The next prime is 87586870279081. The reversal of 87586870278989 is 98987207868578.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20050245062500 + 67536625216489 = 4477750^2 + 8218067^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87586870278989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87586870278898 and 87586870278907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87586870278983) 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, 5427360272 + ... + 5427376409.

It is an arithmetic number, because the mean of its divisors is an integer number (21899431255935).

Almost surely, 2^{87586870278989} is an apocalyptic number.

It is an amenable number.

87586870278989 is a deficient number, since it is larger than the sum of its proper divisors (10854744751).

87586870278989 is a wasteful number, since it uses less digits than its factorization.

87586870278989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10854744750.

The product of its (nonzero) digits is 54623600640, while the sum is 92.

The spelling of 87586870278989 in words is "eighty-seven trillion, five hundred eighty-six billion, eight hundred seventy million, two hundred seventy-eight thousand, nine hundred eighty-nine".