3970381 has 4 divisors (see below), whose sum is σ = 3975264. Its totient is φ = 3965500.

The previous prime is 3970363. The next prime is 3970409. The reversal of 3970381 is 1830793.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1830793 = 61 ⋅30013.

It is a cyclic number.

It is not a de Polignac number, because 3970381 - 2⁵ = 3970349 is a prime.

It is a super-2 number, since 2×3970381² = 31527850570322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3970321) 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, 895 + ... + 2956.

It is an arithmetic number, because the mean of its divisors is an integer number (993816).

Almost surely, 2^3970381 is an apocalyptic number.

It is an amenable number.

3970381 is a deficient number, since it is larger than the sum of its proper divisors (4883).

3970381 is a wasteful number, since it uses less digits than its factorization.

3970381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4882.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 3970381 is about 1992.5814914327. The cubic root of 3970381 is about 158.3473238484.

The spelling of 3970381 in words is "three million, nine hundred seventy thousand, three hundred eighty-one".