3427729 has 4 divisors (see below), whose sum is σ = 3433984. Its totient is φ = 3421476.

The previous prime is 3427709. The next prime is 3427747. The reversal of 3427729 is 9277243.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3427729 - 2²¹ = 1330577 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3427694 and 3427703.

It is not an unprimeable number, because it can be changed into a prime (3427709) 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, 2217 + ... + 3430.

It is an arithmetic number, because the mean of its divisors is an integer number (858496).

Almost surely, 2^3427729 is an apocalyptic number.

It is an amenable number.

3427729 is a deficient number, since it is larger than the sum of its proper divisors (6255).

3427729 is an equidigital number, since it uses as much as digits as its factorization.

3427729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6254.

The product of its digits is 21168, while the sum is 34.

The square root of 3427729 is about 1851.4127038562. The cubic root of 3427729 is about 150.7771371362. Note that the first 3 decimals are identical.

The spelling of 3427729 in words is "three million, four hundred twenty-seven thousand, seven hundred twenty-nine".