4079681 has 4 divisors (see below), whose sum is σ = 4087764. Its totient is φ = 4071600.

The previous prime is 4079659. The next prime is 4079683. The reversal of 4079681 is 1869704.

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

It can be written as a sum of positive squares in 2 ways, for example, as 982081 + 3097600 = 991^2 + 1760^2 .

It is a cyclic number.

It is not a de Polignac number, because 4079681 - 2⁶ = 4079617 is a prime.

It is a super-2 number, since 2×4079681² = 33287594123522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4079683) 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, 3230 + ... + 4311.

It is an arithmetic number, because the mean of its divisors is an integer number (1021941).

Almost surely, 2^4079681 is an apocalyptic number.

It is an amenable number.

4079681 is a deficient number, since it is larger than the sum of its proper divisors (8083).

4079681 is an equidigital number, since it uses as much as digits as its factorization.

4079681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8082.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 4079681 is about 2019.8220218623. The cubic root of 4079681 is about 159.7872302026.

The spelling of 4079681 in words is "four million, seventy-nine thousand, six hundred eighty-one".