3538729 has 4 divisors (see below), whose sum is σ = 3578580. Its totient is φ = 3498880.

The previous prime is 3538699. The next prime is 3538747. The reversal of 3538729 is 9278353.

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 469225 + 3069504 = 685^2 + 1752^2 .

It is a cyclic number.

It is not a de Polignac number, because 3538729 - 2⁵ = 3538697 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3530729) 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, 19792 + ... + 19969.

It is an arithmetic number, because the mean of its divisors is an integer number (894645).

Almost surely, 2^3538729 is an apocalyptic number.

It is an amenable number.

3538729 is a deficient number, since it is larger than the sum of its proper divisors (39851).

3538729 is an equidigital number, since it uses as much as digits as its factorization.

3538729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39850.

The product of its digits is 45360, while the sum is 37.

The square root of 3538729 is about 1881.1509774603. The cubic root of 3538729 is about 152.3874148874.

The spelling of 3538729 in words is "three million, five hundred thirty-eight thousand, seven hundred twenty-nine".