3509661887 has 4 divisors (see below), whose sum is σ = 3511254336. Its totient is φ = 3508069440.

The previous prime is 3509661851. The next prime is 3509661913. The reversal of 3509661887 is 7881669053.

It is a happy number.

3509661887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3509661887 is a prime.

It is a super-2 number, since 2×3509661887² = 24635453122120801538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3509661487) 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, 792914 + ... + 797327.

It is an arithmetic number, because the mean of its divisors is an integer number (877813584).

Almost surely, 2^3509661887 is an apocalyptic number.

3509661887 is a deficient number, since it is larger than the sum of its proper divisors (1592449).

3509661887 is a wasteful number, since it uses less digits than its factorization.

3509661887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1592448.

The product of its (nonzero) digits is 2177280, while the sum is 53.

The square root of 3509661887 is about 59242.3994027926. The cubic root of 3509661887 is about 1519.6903061055.

The spelling of 3509661887 in words is "three billion, five hundred nine million, six hundred sixty-one thousand, eight hundred eighty-seven".