4079729 has 2 divisors, whose sum is σ = 4079730. Its totient is φ = 4079728.

The previous prime is 4079707. The next prime is 4079753. The reversal of 4079729 is 9279704.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2512225 + 1567504 = 1585^2 + 1252^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4079729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4079692 and 4079701.

It is not a weakly prime, because it can be changed into another prime (4079759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2039864 + 2039865.

It is an arithmetic number, because the mean of its divisors is an integer number (2039865).

Almost surely, 2^4079729 is an apocalyptic number.

It is an amenable number.

4079729 is a deficient number, since it is larger than the sum of its proper divisors (1).

4079729 is an equidigital number, since it uses as much as digits as its factorization.

4079729 is an evil number, because the sum of its binary digits is even.

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

The square root of 4079729 is about 2019.8339040624. The cubic root of 4079729 is about 159.7878568657.

The spelling of 4079729 in words is "four million, seventy-nine thousand, seven hundred twenty-nine".