3978901 has 8 divisors (see below), whose sum is σ = 4285440. Its totient is φ = 3680448.

The previous prime is 3978899. The next prime is 3978917. The reversal of 3978901 is 1098793.

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 3978901 - 2¹ = 3978899 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3978971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 981 + ... + 2986.

It is an arithmetic number, because the mean of its divisors is an integer number (535680).

Almost surely, 2^3978901 is an apocalyptic number.

It is an amenable number.

3978901 is a deficient number, since it is larger than the sum of its proper divisors (306539).

3978901 is a wasteful number, since it uses less digits than its factorization.

3978901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4043.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 3978901 is about 1994.7182758475. The cubic root of 3978901 is about 158.4605082277.

The spelling of 3978901 in words is "three million, nine hundred seventy-eight thousand, nine hundred one".