3505816249 has 4 divisors (see below), whose sum is σ = 3775494436. Its totient is φ = 3236138064.

The previous prime is 3505816219. The next prime is 3505816261. The reversal of 3505816249 is 9426185053.

3505816249 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, and also an emirpimes, since its reverse is a distinct semiprime: 9426185053 = 463 ⋅20358931.

It can be written as a sum of positive squares in 2 ways, for example, as 2356131600 + 1149684649 = 48540^2 + 33907^2 .

It is a cyclic number.

It is not a de Polignac number, because 3505816249 - 2⁹ = 3505815737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3505816219) 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, 134839074 + ... + 134839099.

It is an arithmetic number, because the mean of its divisors is an integer number (943873609).

Almost surely, 2^3505816249 is an apocalyptic number.

It is an amenable number.

3505816249 is a deficient number, since it is larger than the sum of its proper divisors (269678187).

3505816249 is a wasteful number, since it uses less digits than its factorization.

3505816249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269678186.

The product of its (nonzero) digits is 259200, while the sum is 43.

The square root of 3505816249 is about 59209.9337020402. The cubic root of 3505816249 is about 1519.1350470499.

The spelling of 3505816249 in words is "three billion, five hundred five million, eight hundred sixteen thousand, two hundred forty-nine".