7897228477 has 2 divisors, whose sum is σ = 7897228478. Its totient is φ = 7897228476.

The previous prime is 7897228441. The next prime is 7897228523. The reversal of 7897228477 is 7748227987.

7897228477 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7869286681 + 27941796 = 88709^2 + 5286^2 .

It is a cyclic number.

It is not a de Polignac number, because 7897228477 - 2¹¹ = 7897226429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7897229477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3948614238 + 3948614239.

It is an arithmetic number, because the mean of its divisors is an integer number (3948614239).

Almost surely, 2^7897228477 is an apocalyptic number.

It is an amenable number.

7897228477 is a deficient number, since it is larger than the sum of its proper divisors (1).

7897228477 is an equidigital number, since it uses as much as digits as its factorization.

7897228477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22127616, while the sum is 61.

The square root of 7897228477 is about 88866.3517705099. The cubic root of 7897228477 is about 1991.3987688555.

The spelling of 7897228477 in words is "seven billion, eight hundred ninety-seven million, two hundred twenty-eight thousand, four hundred seventy-seven".