63421420789 has 2 divisors, whose sum is σ = 63421420790. Its totient is φ = 63421420788.

The previous prime is 63421420781. The next prime is 63421420847. The reversal of 63421420789 is 98702412436.

It is a happy number.

63421420789 is digitally balanced in base 2, 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., 53901515889 + 9519904900 = 232167^2 + 97570^2 .

It is a cyclic number.

It is not a de Polignac number, because 63421420789 - 2³ = 63421420781 is a prime.

It is a super-2 number, since 2×63421420789² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63421420781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31710710394 + 31710710395.

It is an arithmetic number, because the mean of its divisors is an integer number (31710710395).

Almost surely, 2^63421420789 is an apocalyptic number.

It is an amenable number.

63421420789 is a deficient number, since it is larger than the sum of its proper divisors (1).

63421420789 is an equidigital number, since it uses as much as digits as its factorization.

63421420789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 580608, while the sum is 46.

The spelling of 63421420789 in words is "sixty-three billion, four hundred twenty-one million, four hundred twenty thousand, seven hundred eighty-nine".