2163761 has 2 divisors, whose sum is σ = 2163762. Its totient is φ = 2163760.

The previous prime is 2163757. The next prime is 2163767. The reversal of 2163761 is 1673612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1547536 + 616225 = 1244^2 + 785^2 .

It is a cyclic number.

It is not a de Polignac number, because 2163761 - 2² = 2163757 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2163761.

It is not a weakly prime, because it can be changed into another prime (2163767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1081880 + 1081881.

It is an arithmetic number, because the mean of its divisors is an integer number (1081881).

2^2163761 is an apocalyptic number.

It is an amenable number.

2163761 is a deficient number, since it is larger than the sum of its proper divisors (1).

2163761 is an equidigital number, since it uses as much as digits as its factorization.

2163761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 26.

The square root of 2163761 is about 1470.9728073625. The cubic root of 2163761 is about 129.3410640919.

The spelling of 2163761 in words is "two million, one hundred sixty-three thousand, seven hundred sixty-one".