361687871 has 4 divisors (see below), whose sum is σ = 361753152. Its totient is φ = 361622592.

The previous prime is 361687861. The next prime is 361687883. The reversal of 361687871 is 178786163.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 178786163 = 2441 ⋅73243.

It is a cyclic number.

It is not a de Polignac number, because 361687871 - 2¹⁰ = 361686847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (361687831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23471 + ... + 35696.

It is an arithmetic number, because the mean of its divisors is an integer number (90438288).

Almost surely, 2^361687871 is an apocalyptic number.

361687871 is a deficient number, since it is larger than the sum of its proper divisors (65281).

361687871 is an equidigital number, since it uses as much as digits as its factorization.

361687871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65280.

The product of its digits is 338688, while the sum is 47.

The square root of 361687871 is about 19018.0932535310. The cubic root of 361687871 is about 712.4887014111.

The spelling of 361687871 in words is "three hundred sixty-one million, six hundred eighty-seven thousand, eight hundred seventy-one".