2129977 has 2 divisors, whose sum is σ = 2129978. Its totient is φ = 2129976.

The previous prime is 2129971. The next prime is 2129983. The reversal of 2129977 is 7799212.

It is a balanced prime because it is at equal distance from previous prime (2129971) and next prime (2129983).

It can be written as a sum of positive squares in only one way, i.e., 2128681 + 1296 = 1459^2 + 36^2 .

It is a cyclic number.

It is not a de Polignac number, because 2129977 - 2⁷ = 2129849 is a prime.

2129977 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2129971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064988 + 1064989.

It is an arithmetic number, because the mean of its divisors is an integer number (1064989).

2^2129977 is an apocalyptic number.

It is an amenable number.

2129977 is a deficient number, since it is larger than the sum of its proper divisors (1).

2129977 is an equidigital number, since it uses as much as digits as its factorization.

2129977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15876, while the sum is 37.

The square root of 2129977 is about 1459.4440722412. Note that the first 3 decimals coincide. The cubic root of 2129977 is about 128.6643720078.

The spelling of 2129977 in words is "two million, one hundred twenty-nine thousand, nine hundred seventy-seven".