107887561 has 4 divisors (see below), whose sum is σ = 108288900. Its totient is φ = 107486224.

The previous prime is 107887543. The next prime is 107887583. The reversal of 107887561 is 165788701.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 165788701 = 13 ⋅12752977.

It can be written as a sum of positive squares in 2 ways, for example, as 19527561 + 88360000 = 4419^2 + 9400^2 .

It is a cyclic number.

It is not a de Polignac number, because 107887561 - 2¹⁹ = 107363273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (107887531) 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, 200266 + ... + 200803.

It is an arithmetic number, because the mean of its divisors is an integer number (27072225).

Almost surely, 2^107887561 is an apocalyptic number.

It is an amenable number.

107887561 is a deficient number, since it is larger than the sum of its proper divisors (401339).

107887561 is an equidigital number, since it uses as much as digits as its factorization.

107887561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401338.

The product of its (nonzero) digits is 94080, while the sum is 43.

The square root of 107887561 is about 10386.8937127517. The cubic root of 107887561 is about 476.0549935873.

The spelling of 107887561 in words is "one hundred seven million, eight hundred eighty-seven thousand, five hundred sixty-one".