2077861 has 2 divisors, whose sum is σ = 2077862. Its totient is φ = 2077860.

The previous prime is 2077853. The next prime is 2077891. The reversal of 2077861 is 1687702.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1515361 + 562500 = 1231^2 + 750^2 .

It is a cyclic number.

It is not a de Polignac number, because 2077861 - 2³ = 2077853 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2077811) 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, 1038930 + 1038931.

It is an arithmetic number, because the mean of its divisors is an integer number (1038931).

2^2077861 is an apocalyptic number.

It is an amenable number.

2077861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2077861 is an equidigital number, since it uses as much as digits as its factorization.

2077861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 2077861 is about 1441.4787546128. The cubic root of 2077861 is about 127.6063139926.

The spelling of 2077861 in words is "two million, seventy-seven thousand, eight hundred sixty-one".