7978099 has 2 divisors, whose sum is σ = 7978100. Its totient is φ = 7978098.

The previous prime is 7978063. The next prime is 7978169. The reversal of 7978099 is 9908797.

It is a weak prime.

It is an emirp because it is prime and its reverse (9908797) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7978099 - 2⁷ = 7977971 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7978699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3989049 + 3989050.

It is an arithmetic number, because the mean of its divisors is an integer number (3989050).

Almost surely, 2^7978099 is an apocalyptic number.

7978099 is a deficient number, since it is larger than the sum of its proper divisors (1).

7978099 is an equidigital number, since it uses as much as digits as its factorization.

7978099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 49.

The square root of 7978099 is about 2824.5528849714. The cubic root of 7978099 is about 199.8173248664.

The spelling of 7978099 in words is "seven million, nine hundred seventy-eight thousand, ninety-nine".