989653633 has 2 divisors, whose sum is σ = 989653634. Its totient is φ = 989653632.

The previous prime is 989653607. The next prime is 989653697. The reversal of 989653633 is 336356989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 973876849 + 15776784 = 31207^2 + 3972^2 .

It is a cyclic number.

It is not a de Polignac number, because 989653633 - 2¹³ = 989645441 is a prime.

It is not a weakly prime, because it can be changed into another prime (989653603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494826816 + 494826817.

It is an arithmetic number, because the mean of its divisors is an integer number (494826817).

Almost surely, 2^989653633 is an apocalyptic number.

It is an amenable number.

989653633 is a deficient number, since it is larger than the sum of its proper divisors (1).

989653633 is an equidigital number, since it uses as much as digits as its factorization.

989653633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3149280, while the sum is 52.

The square root of 989653633 is about 31458.7608306494. The cubic root of 989653633 is about 996.5392480119.

The spelling of 989653633 in words is "nine hundred eighty-nine million, six hundred fifty-three thousand, six hundred thirty-three".