63994789 has 2 divisors, whose sum is σ = 63994790. Its totient is φ = 63994788.

The previous prime is 63994771. The next prime is 63994807. The reversal of 63994789 is 98749936.

It is a balanced prime because it is at equal distance from previous prime (63994771) and next prime (63994807).

It can be written as a sum of positive squares in only one way, i.e., 60062500 + 3932289 = 7750^2 + 1983^2 .

It is a cyclic number.

It is not a de Polignac number, because 63994789 - 2¹⁷ = 63863717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63994729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31997394 + 31997395.

It is an arithmetic number, because the mean of its divisors is an integer number (31997395).

Almost surely, 2^63994789 is an apocalyptic number.

It is an amenable number.

63994789 is a deficient number, since it is larger than the sum of its proper divisors (1).

63994789 is an equidigital number, since it uses as much as digits as its factorization.

63994789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2939328, while the sum is 55.

The square root of 63994789 is about 7999.6743058702. The cubic root of 63994789 is about 399.9891434553.

The spelling of 63994789 in words is "sixty-three million, nine hundred ninety-four thousand, seven hundred eighty-nine".