3987923 has 4 divisors (see below), whose sum is σ = 3993408. Its totient is φ = 3982440.

The previous prime is 3987913. The next prime is 3987931. The reversal of 3987923 is 3297893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3297893 = 1303 ⋅2531.

It is a cyclic number.

It is not a de Polignac number, because 3987923 - 2⁶ = 3987859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3987913) 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, 1448 + ... + 3173.

It is an arithmetic number, because the mean of its divisors is an integer number (998352).

Almost surely, 2^3987923 is an apocalyptic number.

3987923 is a deficient number, since it is larger than the sum of its proper divisors (5485).

3987923 is an equidigital number, since it uses as much as digits as its factorization.

3987923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5484.

The product of its digits is 81648, while the sum is 41.

The square root of 3987923 is about 1996.9784675855. The cubic root of 3987923 is about 158.5801854552.

The spelling of 3987923 in words is "three million, nine hundred eighty-seven thousand, nine hundred twenty-three".