2190841687 has 2 divisors, whose sum is σ = 2190841688. Its totient is φ = 2190841686.

The previous prime is 2190841673. The next prime is 2190841733. The reversal of 2190841687 is 7861480912.

2190841687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (2190841733) can be obtained adding 2190841687 to its sum of digits (46).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2190841687 - 2⁷ = 2190841559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2190844687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1095420843 + 1095420844.

It is an arithmetic number, because the mean of its divisors is an integer number (1095420844).

Almost surely, 2^2190841687 is an apocalyptic number.

2190841687 is a deficient number, since it is larger than the sum of its proper divisors (1).

2190841687 is an equidigital number, since it uses as much as digits as its factorization.

2190841687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 46.

The square root of 2190841687 is about 46806.4278384924. The cubic root of 2190841687 is about 1298.7842059155.

The spelling of 2190841687 in words is "two billion, one hundred ninety million, eight hundred forty-one thousand, six hundred eighty-seven".