3978607 has 4 divisors (see below), whose sum is σ = 3998800.
Its totient is φ = 3958416.
The previous prime is 3978593. The next prime is 3978641. The reversal of 3978607 is 7068793.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is not a de Polignac number, because 3978607 - 27 = 3978479 is a prime.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 3978607.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (3978707) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9798 + ... + 10195.
It is an arithmetic number, because the mean of its divisors is an integer number (999700).
Almost surely, 23978607 is an apocalyptic number.
3978607 is a deficient number, since it is larger than the sum of its proper divisors (20193).
3978607 is a wasteful number, since it uses less digits than its factorization.
3978607 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 20192.
The product of its (nonzero) digits is 63504, while the sum is 40.
The square root of 3978607 is about 1994.6445798688.
The cubic root of 3978607 is about 158.4566052625.
The spelling of 3978607 in words is "three million, nine hundred seventy-eight thousand, six hundred seven".