3990927 has 4 divisors (see below), whose sum is σ = 5321240. Its totient is φ = 2660616.

The previous prime is 3990919. The next prime is 3990929. The reversal of 3990927 is 7290993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7290993 = 3 ⋅2430331.

It is not a de Polignac number, because 3990927 - 2³ = 3990919 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3990929) 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, 665152 + ... + 665157.

It is an arithmetic number, because the mean of its divisors is an integer number (1330310).

Almost surely, 2^3990927 is an apocalyptic number.

3990927 is a deficient number, since it is larger than the sum of its proper divisors (1330313).

3990927 is a wasteful number, since it uses less digits than its factorization.

3990927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330312.

The product of its (nonzero) digits is 30618, while the sum is 39.

The square root of 3990927 is about 1997.7304622997. The cubic root of 3990927 is about 158.6199935887.

The spelling of 3990927 in words is "three million, nine hundred ninety thousand, nine hundred twenty-seven".