3999977 has 4 divisors (see below), whose sum is σ = 4004676. Its totient is φ = 3995280.

The previous prime is 3999971. The next prime is 4000037. The reversal of 3999977 is 7799993.

3999977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7799993 = 359 ⋅21727.

It can be written as a sum of positive squares in 2 ways, for example, as 1752976 + 2247001 = 1324^2 + 1499^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3999977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3999971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 674 + ... + 2907.

It is an arithmetic number, because the mean of its divisors is an integer number (1001169).

Almost surely, 2^3999977 is an apocalyptic number.

It is an amenable number.

3999977 is a deficient number, since it is larger than the sum of its proper divisors (4699).

3999977 is a wasteful number, since it uses less digits than its factorization.

3999977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4698.

The product of its digits is 964467, while the sum is 53.

The square root of 3999977 is about 1999.9942499917. The cubic root of 3999977 is about 158.7398009444.

It can be divided in two parts, 399997 and 7, that added together give a palindrome (400004).

The spelling of 3999977 in words is "three million, nine hundred ninety-nine thousand, nine hundred seventy-seven".