2129797 has 2 divisors, whose sum is σ = 2129798. Its totient is φ = 2129796.

The previous prime is 2129791. The next prime is 2129807. The reversal of 2129797 is 7979212.

2129797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2056356 + 73441 = 1434^2 + 271^2 .

It is a cyclic number.

It is not a de Polignac number, because 2129797 - 2¹⁹ = 1605509 is a prime.

It is a super-2 number, since 2×2129797² = 9072070522418, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2129791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064898 + 1064899.

It is an arithmetic number, because the mean of its divisors is an integer number (1064899).

2^2129797 is an apocalyptic number.

It is an amenable number.

2129797 is a deficient number, since it is larger than the sum of its proper divisors (1).

2129797 is an equidigital number, since it uses as much as digits as its factorization.

2129797 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2129797 is about 1459.3824036215. The cubic root of 2129797 is about 128.6607475181.

It can be divided in two parts, 2129 and 797, that added together give a triangular number (2926 = T₇₆).

The spelling of 2129797 in words is "two million, one hundred twenty-nine thousand, seven hundred ninety-seven".