6422977789 has 2 divisors, whose sum is σ = 6422977790. Its totient is φ = 6422977788.

The previous prime is 6422977787. The next prime is 6422977807. The reversal of 6422977789 is 9877792246.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5858677764 + 564300025 = 76542^2 + 23755^2 .

It is a cyclic number.

It is not a de Polignac number, because 6422977789 - 2¹ = 6422977787 is a prime.

Together with 6422977787, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6422977787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3211488894 + 3211488895.

It is an arithmetic number, because the mean of its divisors is an integer number (3211488895).

Almost surely, 2^6422977789 is an apocalyptic number.

It is an amenable number.

6422977789 is a deficient number, since it is larger than the sum of its proper divisors (1).

6422977789 is an equidigital number, since it uses as much as digits as its factorization.

6422977789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21337344, while the sum is 61.

The square root of 6422977789 is about 80143.4825110564. The cubic root of 6422977789 is about 1858.8548264505.

The spelling of 6422977789 in words is "six billion, four hundred twenty-two million, nine hundred seventy-seven thousand, seven hundred eighty-nine".