3978707 has 2 divisors, whose sum is σ = 3978708.
Its totient is φ = 3978706.
The previous prime is 3978683. The next prime is 3978727. The reversal of 3978707 is 7078793.
It is a happy number.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 3978707 - 26 = 3978643 is a prime.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (3978727) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1989353 + 1989354.
It is an arithmetic number, because the mean of its divisors is an integer number (1989354).
Almost surely, 23978707 is an apocalyptic number.
3978707 is a deficient number, since it is larger than the sum of its proper divisors (1).
3978707 is an equidigital number, since it uses as much as digits as its factorization.
3978707 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 74088, while the sum is 41.
The square root of 3978707 is about 1994.6696468338.
The cubic root of 3978707 is about 158.4579328233.
The spelling of 3978707 in words is "three million, nine hundred seventy-eight thousand, seven hundred seven".