3987293 has 4 divisors (see below), whose sum is σ = 3994848. Its totient is φ = 3979740.

The previous prime is 3987287. The next prime is 3987301. The reversal of 3987293 is 3927893.

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.

It is a cyclic number.

It is not a de Polignac number, because 3987293 - 2⁶ = 3987229 is a prime.

It is a super-4 number, since 4×3987293⁴ (a number of 28 digits) contains 4444 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3987293.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3987593) 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, 2921 + ... + 4062.

It is an arithmetic number, because the mean of its divisors is an integer number (998712).

Almost surely, 2^3987293 is an apocalyptic number.

It is an amenable number.

3987293 is a deficient number, since it is larger than the sum of its proper divisors (7555).

3987293 is an equidigital number, since it uses as much as digits as its factorization.

3987293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7554.

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

The square root of 3987293 is about 1996.8207230495. The cubic root of 3987293 is about 158.5718343430.

The spelling of 3987293 in words is "three million, nine hundred eighty-seven thousand, two hundred ninety-three".