3985777 has 2 divisors, whose sum is σ = 3985778. Its totient is φ = 3985776.

The previous prime is 3985721. The next prime is 3985829. The reversal of 3985777 is 7775893.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3671056 + 314721 = 1916^2 + 561^2 .

It is an emirp because it is prime and its reverse (7775893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3985777 - 2¹⁵ = 3953009 is a prime.

It is an Ulam number.

It is a nialpdrome in base 9.

It is not a weakly prime, because it can be changed into another prime (3985717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1992888 + 1992889.

It is an arithmetic number, because the mean of its divisors is an integer number (1992889).

Almost surely, 2^3985777 is an apocalyptic number.

It is an amenable number.

3985777 is a deficient number, since it is larger than the sum of its proper divisors (1).

3985777 is an equidigital number, since it uses as much as digits as its factorization.

3985777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 370440, while the sum is 46.

The square root of 3985777 is about 1996.4410835284. The cubic root of 3985777 is about 158.5517350447.

The spelling of 3985777 in words is "three million, nine hundred eighty-five thousand, seven hundred seventy-seven".