3973138 has 32 divisors (see below), whose sum is σ = 6940080. Its totient is φ = 1689600.

The previous prime is 3973133. The next prime is 3973139. The reversal of 3973138 is 8313793.

It can be written as a sum of positive squares in 8 ways, for example, as 2301289 + 1671849 = 1517^2 + 1293^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3973133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39288 + ... + 39388.

Almost surely, 2^3973138 is an apocalyptic number.

3973138 is a deficient number, since it is larger than the sum of its proper divisors (2966942).

3973138 is a wasteful number, since it uses less digits than its factorization.

3973138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222.

The product of its digits is 13608, while the sum is 34.

The square root of 3973138 is about 1993.2731874984. The cubic root of 3973138 is about 158.3839670624.

The spelling of 3973138 in words is "three million, nine hundred seventy-three thousand, one hundred thirty-eight".