3897993 has 32 divisors (see below), whose sum is σ = 6031872. Its totient is φ = 2217600.

The previous prime is 3897973. The next prime is 3898001. The reversal of 3897993 is 3997983.

It is not a de Polignac number, because 3897993 - 2¹⁰ = 3896969 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3897973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58146 + ... + 58212.

It is an arithmetic number, because the mean of its divisors is an integer number (188496).

Almost surely, 2^3897993 is an apocalyptic number.

3897993 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

3897993 is a deficient number, since it is larger than the sum of its proper divisors (2133879).

3897993 is a wasteful number, since it uses less digits than its factorization.

3897993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165.

The product of its digits is 367416, while the sum is 48.

The square root of 3897993 is about 1974.3335584445. Note that the first 3 decimals coincide. The cubic root of 3897993 is about 157.3790858313.

The spelling of 3897993 in words is "three million, eight hundred ninety-seven thousand, nine hundred ninety-three".