2166977 has 2 divisors, whose sum is σ = 2166978. Its totient is φ = 2166976.

The previous prime is 2166961. The next prime is 2167003. The reversal of 2166977 is 7796612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2163841 + 3136 = 1471^2 + 56^2 .

It is a cyclic number.

It is not a de Polignac number, because 2166977 - 2⁴ = 2166961 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 2166977.

It is not a weakly prime, because it can be changed into another prime (2166917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083488 + 1083489.

It is an arithmetic number, because the mean of its divisors is an integer number (1083489).

2^2166977 is an apocalyptic number.

It is an amenable number.

2166977 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166977 is an equidigital number, since it uses as much as digits as its factorization.

2166977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31752, while the sum is 38.

The square root of 2166977 is about 1472.0655556055. The cubic root of 2166977 is about 129.4051122857.

The spelling of 2166977 in words is "two million, one hundred sixty-six thousand, nine hundred seventy-seven".