9978607 has 2 divisors, whose sum is σ = 9978608.
Its totient is φ = 9978606.
The previous prime is 9978601. The next prime is 9978613. The reversal of 9978607 is 7068799.
9978607 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a balanced prime because it is at equal distance from previous prime (9978601) and next prime (9978613).
It is a cyclic number.
It is not a de Polignac number, because 9978607 - 23 = 9978599 is a prime.
9978607 is a lucky number.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (9978601) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4989303 + 4989304.
It is an arithmetic number, because the mean of its divisors is an integer number (4989304).
Almost surely, 29978607 is an apocalyptic number.
9978607 is a deficient number, since it is larger than the sum of its proper divisors (1).
9978607 is an equidigital number, since it uses as much as digits as its factorization.
9978607 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 190512, while the sum is 46.
The square root of 9978607 is about 3158.8933188698.
The cubic root of 9978607 is about 215.2897265795.
It can be divided in two parts, 9978 and 607, that added together give a triangular number (10585 = T145).
The spelling of 9978607 in words is "nine million, nine hundred seventy-eight thousand, six hundred seven".