3508681909 has 4 divisors (see below), whose sum is σ = 3512946016. Its totient is φ = 3504417804.

The previous prime is 3508681859. The next prime is 3508681931. The reversal of 3508681909 is 9091868053.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9091868053 = 23 ⋅395298611.

It is a cyclic number.

It is not a de Polignac number, because 3508681909 - 2¹³ = 3508673717 is a prime.

It is a super-3 number, since 3×3508681909³ (a number of 30 digits) contains 333 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 (3508681999) 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, 2130819 + ... + 2132464.

It is an arithmetic number, because the mean of its divisors is an integer number (878236504).

Almost surely, 2^3508681909 is an apocalyptic number.

It is an amenable number.

3508681909 is a deficient number, since it is larger than the sum of its proper divisors (4264107).

3508681909 is an equidigital number, since it uses as much as digits as its factorization.

3508681909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4264106.

The product of its (nonzero) digits is 466560, while the sum is 49.

The square root of 3508681909 is about 59234.1279078202. The cubic root of 3508681909 is about 1519.5488488229.

The spelling of 3508681909 in words is "three billion, five hundred eight million, six hundred eighty-one thousand, nine hundred nine".