3992749 has 8 divisors (see below), whose sum is σ = 4165920. Its totient is φ = 3822000.

The previous prime is 3992741. The next prime is 3992761. The reversal of 3992749 is 9472993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3992749 - 2³ = 3992741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3992741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3274 + ... + 4324.

It is an arithmetic number, because the mean of its divisors is an integer number (520740).

Almost surely, 2^3992749 is an apocalyptic number.

It is an amenable number.

3992749 is a deficient number, since it is larger than the sum of its proper divisors (173171).

3992749 is a wasteful number, since it uses less digits than its factorization.

3992749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211.

The product of its digits is 122472, while the sum is 43.

The square root of 3992749 is about 1998.1864277389. The cubic root of 3992749 is about 158.6441284709.

The spelling of 3992749 in words is "three million, nine hundred ninety-two thousand, seven hundred forty-nine".