187112531087 has 4 divisors (see below), whose sum is σ = 187231033320. Its totient is φ = 186994028856.

The previous prime is 187112530963. The next prime is 187112531167. The reversal of 187112531087 is 780135211781.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-187112531087 is a prime.

It is a super-2 number, since 2×187112531087² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (187112531887) 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, 59248748 + ... + 59251905.

It is an arithmetic number, because the mean of its divisors is an integer number (46807758330).

Almost surely, 2^187112531087 is an apocalyptic number.

187112531087 is a deficient number, since it is larger than the sum of its proper divisors (118502233).

187112531087 is a wasteful number, since it uses less digits than its factorization.

187112531087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118502232.

The product of its (nonzero) digits is 94080, while the sum is 44.

The spelling of 187112531087 in words is "one hundred eighty-seven billion, one hundred twelve million, five hundred thirty-one thousand, eighty-seven".