3967897 has 4 divisors (see below), whose sum is σ = 3974436. Its totient is φ = 3961360.

The previous prime is 3967877. The next prime is 3967913. The reversal of 3967897 is 7987693.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3200521 + 767376 = 1789^2 + 876^2 .

It is a cyclic number.

It is not a de Polignac number, because 3967897 - 2¹¹ = 3965849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3967897.

It is not an unprimeable number, because it can be changed into a prime (3967837) 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, 2254 + ... + 3607.

It is an arithmetic number, because the mean of its divisors is an integer number (993609).

Almost surely, 2^3967897 is an apocalyptic number.

It is an amenable number.

3967897 is a deficient number, since it is larger than the sum of its proper divisors (6539).

3967897 is an equidigital number, since it uses as much as digits as its factorization.

3967897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6538.

The product of its digits is 571536, while the sum is 49.

The square root of 3967897 is about 1991.9580818883. The cubic root of 3967897 is about 158.3142945406.

The spelling of 3967897 in words is "three million, nine hundred sixty-seven thousand, eight hundred ninety-seven".