3937521465 has 12 divisors (see below), whose sum is σ = 6825037284. Its totient is φ = 2100011424.

The previous prime is 3937521443. The next prime is 3937521503. The reversal of 3937521465 is 5641257393.

3937521465 is a `hidden beast` number, since 3 + 9 + 375 + 214 + 65 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 924828921 + 3012692544 = 30411^2 + 54888^2 .

It is not a de Polignac number, because 3937521465 - 2⁵ = 3937521433 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 87500477 = 3937521465 / (3 + 9 + 3 + 7 + 5 + 2 + 1 + 4 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 3937521465.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43750194 + ... + 43750283.

It is an arithmetic number, because the mean of its divisors is an integer number (568753107).

Almost surely, 2^3937521465 is an apocalyptic number.

It is an amenable number.

3937521465 is a deficient number, since it is larger than the sum of its proper divisors (2887515819).

3937521465 is a wasteful number, since it uses less digits than its factorization.

3937521465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87500488 (or 87500485 counting only the distinct ones).

The product of its digits is 680400, while the sum is 45.

The square root of 3937521465 is about 62749.6730270366. The cubic root of 3937521465 is about 1579.0927688408.

The spelling of 3937521465 in words is "three billion, nine hundred thirty-seven million, five hundred twenty-one thousand, four hundred sixty-five".