2187940361 has 8 divisors (see below), whose sum is σ = 2202660384. Its totient is φ = 2173236480.

The previous prime is 2187940333. The next prime is 2187940367. The reversal of 2187940361 is 1630497812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2187940361 - 2¹⁴ = 2187923977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2187940367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 399401 + ... + 404841.

It is an arithmetic number, because the mean of its divisors is an integer number (275332548).

Almost surely, 2^2187940361 is an apocalyptic number.

It is an amenable number.

2187940361 is a deficient number, since it is larger than the sum of its proper divisors (14720023).

2187940361 is a wasteful number, since it uses less digits than its factorization.

2187940361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8071.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 2187940361 is about 46775.4247548860. The cubic root of 2187940361 is about 1298.2106271191.

The spelling of 2187940361 in words is "two billion, one hundred eighty-seven million, nine hundred forty thousand, three hundred sixty-one".