2129707 has 4 divisors (see below), whose sum is σ = 2133976. Its totient is φ = 2125440.

The previous prime is 2129689. The next prime is 2129713. The reversal of 2129707 is 7079212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2129707 - 2⁷ = 2129579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2129797) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1269 + ... + 2422.

It is an arithmetic number, because the mean of its divisors is an integer number (533494).

2^2129707 is an apocalyptic number.

2129707 is a deficient number, since it is larger than the sum of its proper divisors (4269).

2129707 is an equidigital number, since it uses as much as digits as its factorization.

2129707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4268.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 2129707 is about 1459.3515683344. The cubic root of 2129707 is about 128.6589351966.

The spelling of 2129707 in words is "two million, one hundred twenty-nine thousand, seven hundred seven".