3977809 has 8 divisors (see below), whose sum is σ = 4421952. Its totient is φ = 3547440.

The previous prime is 3977807. The next prime is 3977819. The reversal of 3977809 is 9087793.

3977809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3977809 - 2¹ = 3977807 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3977807) 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 7 ways as a sum of consecutive naturals, for example, 2829 + ... + 3994.

It is an arithmetic number, because the mean of its divisors is an integer number (552744).

Almost surely, 2^3977809 is an apocalyptic number.

It is an amenable number.

3977809 is a deficient number, since it is larger than the sum of its proper divisors (444143).

3977809 is a wasteful number, since it uses less digits than its factorization.

3977809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6887.

The product of its (nonzero) digits is 95256, while the sum is 43.

The square root of 3977809 is about 1994.4445341999. Note that the first 3 decimals coincide. The cubic root of 3977809 is about 158.4460105304.

The spelling of 3977809 in words is "three million, nine hundred seventy-seven thousand, eight hundred nine".