2084871661 has 2 divisors, whose sum is σ = 2084871662. Its totient is φ = 2084871660.

The previous prime is 2084871601. The next prime is 2084871673. The reversal of 2084871661 is 1661784802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1988714025 + 96157636 = 44595^2 + 9806^2 .

It is a cyclic number.

It is not a de Polignac number, because 2084871661 - 2¹⁵ = 2084838893 is a prime.

It is a super-3 number, since 3×2084871661³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2084871601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1042435830 + 1042435831.

It is an arithmetic number, because the mean of its divisors is an integer number (1042435831).

Almost surely, 2^2084871661 is an apocalyptic number.

It is an amenable number.

2084871661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2084871661 is an equidigital number, since it uses as much as digits as its factorization.

2084871661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129024, while the sum is 43.

The square root of 2084871661 is about 45660.3948844072. The cubic root of 2084871661 is about 1277.4966659814.

The spelling of 2084871661 in words is "two billion, eighty-four million, eight hundred seventy-one thousand, six hundred sixty-one".