3750520309 has 4 divisors (see below), whose sum is σ = 3762503116. Its totient is φ = 3738537504.

The previous prime is 3750520307. The next prime is 3750520349. The reversal of 3750520309 is 9030250573.

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

It can be written as a sum of positive squares in 2 ways, for example, as 41344900 + 3709175409 = 6430^2 + 60903^2 .

It is a cyclic number.

It is not a de Polignac number, because 3750520309 - 2¹ = 3750520307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3750520303) 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, 5990934 + ... + 5991559.

It is an arithmetic number, because the mean of its divisors is an integer number (940625779).

Almost surely, 2^3750520309 is an apocalyptic number.

It is an amenable number.

3750520309 is a deficient number, since it is larger than the sum of its proper divisors (11982807).

3750520309 is a wasteful number, since it uses less digits than its factorization.

3750520309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11982806.

The product of its (nonzero) digits is 28350, while the sum is 34.

The square root of 3750520309 is about 61241.4917274228. The cubic root of 3750520309 is about 1553.6881039223.

The spelling of 3750520309 in words is "three billion, seven hundred fifty million, five hundred twenty thousand, three hundred nine".