3992489 has 4 divisors (see below), whose sum is σ = 4202640. Its totient is φ = 3782340.

The previous prime is 3992479. The next prime is 3992503. The reversal of 3992489 is 9842993.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9842993 = 41 ⋅240073.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3992489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3992419) 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, 105047 + ... + 105084.

It is an arithmetic number, because the mean of its divisors is an integer number (1050660).

Almost surely, 2^3992489 is an apocalyptic number.

It is an amenable number.

3992489 is a deficient number, since it is larger than the sum of its proper divisors (210151).

3992489 is a wasteful number, since it uses less digits than its factorization.

3992489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210150.

The product of its digits is 139968, while the sum is 44.

The square root of 3992489 is about 1998.1213676852. The cubic root of 3992489 is about 158.6406848645.

The spelling of 3992489 in words is "three million, nine hundred ninety-two thousand, four hundred eighty-nine".