3927985 has 4 divisors (see below), whose sum is σ = 4713588. Its totient is φ = 3142384.

The previous prime is 3927971. The next prime is 3927997. The reversal of 3927985 is 5897293.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5897293 = 359 ⋅16427.

It can be written as a sum of positive squares in 2 ways, for example, as 1710864 + 2217121 = 1308^2 + 1489^2 .

It is a cyclic number.

It is not a de Polignac number, because 3927985 - 2²¹ = 1830833 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 392794 + ... + 392803.

It is an arithmetic number, because the mean of its divisors is an integer number (1178397).

Almost surely, 2^3927985 is an apocalyptic number.

It is an amenable number.

3927985 is a deficient number, since it is larger than the sum of its proper divisors (785603).

3927985 is an equidigital number, since it uses as much as digits as its factorization.

3927985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785602.

The product of its digits is 136080, while the sum is 43.

The square root of 3927985 is about 1981.9144784778. The cubic root of 3927985 is about 157.7816912377.

The spelling of 3927985 in words is "three million, nine hundred twenty-seven thousand, nine hundred eighty-five".