63822989 has 2 divisors, whose sum is σ = 63822990. Its totient is φ = 63822988.

The previous prime is 63822959. The next prime is 63822991. The reversal of 63822989 is 98922836.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35200489 + 28622500 = 5933^2 + 5350^2 .

It is a cyclic number.

It is not a de Polignac number, because 63822989 - 2¹² = 63818893 is a prime.

Together with 63822991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63822929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31911494 + 31911495.

It is an arithmetic number, because the mean of its divisors is an integer number (31911495).

Almost surely, 2^63822989 is an apocalyptic number.

It is an amenable number.

63822989 is a deficient number, since it is larger than the sum of its proper divisors (1).

63822989 is an equidigital number, since it uses as much as digits as its factorization.

63822989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 47.

The square root of 63822989 is about 7988.9291522707. The cubic root of 63822989 is about 399.6308865763.

The spelling of 63822989 in words is "sixty-three million, eight hundred twenty-two thousand, nine hundred eighty-nine".