3505729 has 4 divisors (see below), whose sum is σ = 3658176. Its totient is φ = 3353284.

The previous prime is 3505727. The next prime is 3505751. The reversal of 3505729 is 9275053.

It is a happy number.

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 3505729 - 2¹ = 3505727 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3505729.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3505727) 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, 76189 + ... + 76234.

It is an arithmetic number, because the mean of its divisors is an integer number (914544).

Almost surely, 2^3505729 is an apocalyptic number.

It is an amenable number.

3505729 is a deficient number, since it is larger than the sum of its proper divisors (152447).

3505729 is a wasteful number, since it uses less digits than its factorization.

3505729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152446.

The product of its (nonzero) digits is 9450, while the sum is 31.

The square root of 3505729 is about 1872.3592069899. The cubic root of 3505729 is about 151.9122444743.

The spelling of 3505729 in words is "three million, five hundred five thousand, seven hundred twenty-nine".