3749527621 has 16 divisors (see below), whose sum is σ = 4512412800. Its totient is φ = 3043579968.

The previous prime is 3749527567. The next prime is 3749527627. The reversal of 3749527621 is 1267259473.

It is a cyclic number.

It is not a de Polignac number, because 3749527621 - 2²¹ = 3747430469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3749527627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 658575 + ... + 664243.

It is an arithmetic number, because the mean of its divisors is an integer number (282025800).

Almost surely, 2^3749527621 is an apocalyptic number.

It is an amenable number.

3749527621 is a deficient number, since it is larger than the sum of its proper divisors (762885179).

3749527621 is a wasteful number, since it uses less digits than its factorization.

3749527621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10668.

The product of its digits is 635040, while the sum is 46.

The square root of 3749527621 is about 61233.3864897247. The cubic root of 3749527621 is about 1553.5510150649.

The spelling of 3749527621 in words is "three billion, seven hundred forty-nine million, five hundred twenty-seven thousand, six hundred twenty-one".