3895781 has 2 divisors, whose sum is σ = 3895782. Its totient is φ = 3895780.

The previous prime is 3895777. The next prime is 3895789. The reversal of 3895781 is 1875983.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3865156 + 30625 = 1966^2 + 175^2 .

It is an emirp because it is prime and its reverse (1875983) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3895781 - 2² = 3895777 is a prime.

It is a super-3 number, since 3×3895781³ (a number of 21 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3895789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1947890 + 1947891.

It is an arithmetic number, because the mean of its divisors is an integer number (1947891).

Almost surely, 2^3895781 is an apocalyptic number.

It is an amenable number.

3895781 is a deficient number, since it is larger than the sum of its proper divisors (1).

3895781 is an equidigital number, since it uses as much as digits as its factorization.

3895781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 41.

The square root of 3895781 is about 1973.7732899196. The cubic root of 3895781 is about 157.3493108156.

The spelling of 3895781 in words is "three million, eight hundred ninety-five thousand, seven hundred eighty-one".