2187764941 has 2 divisors, whose sum is σ = 2187764942. Its totient is φ = 2187764940.

The previous prime is 2187764927. The next prime is 2187765001. The reversal of 2187764941 is 1494677812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1827562500 + 360202441 = 42750^2 + 18979^2 .

It is a cyclic number.

It is not a de Polignac number, because 2187764941 - 2⁹ = 2187764429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2187764911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1093882470 + 1093882471.

It is an arithmetic number, because the mean of its divisors is an integer number (1093882471).

Almost surely, 2^2187764941 is an apocalyptic number.

It is an amenable number.

2187764941 is a deficient number, since it is larger than the sum of its proper divisors (1).

2187764941 is an equidigital number, since it uses as much as digits as its factorization.

2187764941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 49.

The square root of 2187764941 is about 46773.5495873469. The cubic root of 2187764941 is about 1298.1759311406.

The spelling of 2187764941 in words is "two billion, one hundred eighty-seven million, seven hundred sixty-four thousand, nine hundred forty-one".