3750003721 has 4 divisors (see below), whose sum is σ = 3752941572. Its totient is φ = 3747065872.

The previous prime is 3750003713. The next prime is 3750003737. The reversal of 3750003721 is 1273000573.

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 2440360000 + 1309643721 = 49400^2 + 36189^2 .

It is a cyclic number.

It is not a de Polignac number, because 3750003721 - 2³ = 3750003713 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3750003721.

It is not an unprimeable number, because it can be changed into a prime (3750003791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1467010 + ... + 1469563.

It is an arithmetic number, because the mean of its divisors is an integer number (938235393).

Almost surely, 2^3750003721 is an apocalyptic number.

It is an amenable number.

3750003721 is a deficient number, since it is larger than the sum of its proper divisors (2937851).

3750003721 is a wasteful number, since it uses less digits than its factorization.

3750003721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2937850.

The product of its (nonzero) digits is 4410, while the sum is 28.

The square root of 3750003721 is about 61237.2739514097. The cubic root of 3750003721 is about 1553.6167668440.

The spelling of 3750003721 in words is "three billion, seven hundred fifty million, three thousand, seven hundred twenty-one".