3973381 has 2 divisors, whose sum is σ = 3973382. Its totient is φ = 3973380.

The previous prime is 3973339. The next prime is 3973391. The reversal of 3973381 is 1833793.

3973381 = 1409² + 1410².

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1988100 + 1985281 = 1410^2 + 1409^2 .

It is a cyclic number.

It is not a de Polignac number, because 3973381 - 2⁷ = 3973253 is a prime.

It is a super-2 number, since 2×3973381² = 31575513142322, which contains 22 as substring.

3973381 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3973331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1986690 + 1986691.

It is an arithmetic number, because the mean of its divisors is an integer number (1986691).

Almost surely, 2^3973381 is an apocalyptic number.

3973381 is the 1410-th centered square number.

It is an amenable number.

3973381 is a deficient number, since it is larger than the sum of its proper divisors (1).

3973381 is an equidigital number, since it uses as much as digits as its factorization.

3973381 is an odious number, because the sum of its binary digits is odd.

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

The square root of 3973381 is about 1993.3341415829. The cubic root of 3973381 is about 158.3871959560.

The spelling of 3973381 in words is "three million, nine hundred seventy-three thousand, three hundred eighty-one".