7978055 has 4 divisors (see below), whose sum is σ = 9573672. Its totient is φ = 6382440.

The previous prime is 7978021. The next prime is 7978063. The reversal of 7978055 is 5508797.

It is a happy number.

7978055 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5508797 = 7 ⋅786971.

It is not a de Polignac number, because 7978055 - 2⁸ = 7977799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 797801 + ... + 797810.

It is an arithmetic number, because the mean of its divisors is an integer number (2393418).

Almost surely, 2^7978055 is an apocalyptic number.

7978055 is a deficient number, since it is larger than the sum of its proper divisors (1595617).

7978055 is a wasteful number, since it uses less digits than its factorization.

7978055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1595616.

The product of its (nonzero) digits is 88200, while the sum is 41.

The square root of 7978055 is about 2824.5450961172. The cubic root of 7978055 is about 199.8169575284.

The spelling of 7978055 in words is "seven million, nine hundred seventy-eight thousand, fifty-five".