2163900787 has 2 divisors, whose sum is σ = 2163900788. Its totient is φ = 2163900786.

The previous prime is 2163900769. The next prime is 2163900841. The reversal of 2163900787 is 7870093612.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2163900787 - 2¹¹ = 2163898739 is a prime.

It is not a weakly prime, because it can be changed into another prime (2163900737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1081950393 + 1081950394.

It is an arithmetic number, because the mean of its divisors is an integer number (1081950394).

Almost surely, 2^2163900787 is an apocalyptic number.

2163900787 is a deficient number, since it is larger than the sum of its proper divisors (1).

2163900787 is an equidigital number, since it uses as much as digits as its factorization.

2163900787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 2163900787 is about 46517.7470112214. The cubic root of 2163900787 is about 1293.4384933638.

The spelling of 2163900787 in words is "two billion, one hundred sixty-three million, nine hundred thousand, seven hundred eighty-seven".