835388989 has 2 divisors, whose sum is σ = 835388990. Its totient is φ = 835388988.

The previous prime is 835388987. The next prime is 835389007. The reversal of 835388989 is 989883538.

835388989 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., 648109764 + 187279225 = 25458^2 + 13685^2 .

It is a cyclic number.

It is not a de Polignac number, because 835388989 - 2¹ = 835388987 is a prime.

Together with 835388987, 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 (835388987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 417694494 + 417694495.

It is an arithmetic number, because the mean of its divisors is an integer number (417694495).

Almost surely, 2^835388989 is an apocalyptic number.

It is an amenable number.

835388989 is a deficient number, since it is larger than the sum of its proper divisors (1).

835388989 is an equidigital number, since it uses as much as digits as its factorization.

835388989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14929920, while the sum is 61.

The square root of 835388989 is about 28903.0965296108. The cubic root of 835388989 is about 941.8091719209.

The spelling of 835388989 in words is "eight hundred thirty-five million, three hundred eighty-eight thousand, nine hundred eighty-nine".