3509213647 has 4 divisors (see below), whose sum is σ = 3510370656. Its totient is φ = 3508056640.

The previous prime is 3509213639. The next prime is 3509213693. The reversal of 3509213647 is 7463129053.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 3509213647 - 2³ = 3509213639 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3509013647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 573943 + ... + 580024.

It is an arithmetic number, because the mean of its divisors is an integer number (877592664).

Almost surely, 2^3509213647 is an apocalyptic number.

3509213647 is a deficient number, since it is larger than the sum of its proper divisors (1157009).

3509213647 is a wasteful number, since it uses less digits than its factorization.

3509213647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157008.

The product of its (nonzero) digits is 136080, while the sum is 40.

The square root of 3509213647 is about 59238.6161806638. The cubic root of 3509213647 is about 1519.6256070921.

It can be divided in two parts, 3509 and 213647, that added together give a square (217156 = 466²).

The spelling of 3509213647 in words is "three billion, five hundred nine million, two hundred thirteen thousand, six hundred forty-seven".