2187366901 has 2 divisors, whose sum is σ = 2187366902. Its totient is φ = 2187366900.

The previous prime is 2187366893. The next prime is 2187366941. The reversal of 2187366901 is 1096637812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1870562500 + 316804401 = 43250^2 + 17799^2 .

It is a cyclic number.

It is not a de Polignac number, because 2187366901 - 2³ = 2187366893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2187366941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1093683450 + 1093683451.

It is an arithmetic number, because the mean of its divisors is an integer number (1093683451).

Almost surely, 2^2187366901 is an apocalyptic number.

It is an amenable number.

2187366901 is a deficient number, since it is larger than the sum of its proper divisors (1).

2187366901 is an equidigital number, since it uses as much as digits as its factorization.

2187366901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 2187366901 is about 46769.2944248681. The cubic root of 2187366901 is about 1298.0971967089.

The spelling of 2187366901 in words is "two billion, one hundred eighty-seven million, three hundred sixty-six thousand, nine hundred one".