7888421797 has 2 divisors, whose sum is σ = 7888421798. Its totient is φ = 7888421796.

The previous prime is 7888421773. The next prime is 7888421809. The reversal of 7888421797 is 7971248887.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7764076996 + 124344801 = 88114^2 + 11151^2 .

It is a cyclic number.

It is not a de Polignac number, because 7888421797 - 2¹⁹ = 7887897509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7888427797) 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, 3944210898 + 3944210899.

It is an arithmetic number, because the mean of its divisors is an integer number (3944210899).

Almost surely, 2^7888421797 is an apocalyptic number.

It is an amenable number.

7888421797 is a deficient number, since it is larger than the sum of its proper divisors (1).

7888421797 is an equidigital number, since it uses as much as digits as its factorization.

7888421797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12644352, while the sum is 61.

The square root of 7888421797 is about 88816.7878106386. The cubic root of 7888421797 is about 1990.6582502086.

The spelling of 7888421797 in words is "seven billion, eight hundred eighty-eight million, four hundred twenty-one thousand, seven hundred ninety-seven".