989790732289 has 4 divisors (see below), whose sum is σ = 1012809121456. Its totient is φ = 966772343124.

The previous prime is 989790732283. The next prime is 989790732299. The reversal of 989790732289 is 982237097989.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 989790732289 - 2²¹ = 989788635137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (989790732283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11509194519 + ... + 11509194604.

It is an arithmetic number, because the mean of its divisors is an integer number (253202280364).

It is a Proth number, since it is equal to 471969 ⋅ 2²¹ + 1 and 471969 < 2²¹.

Almost surely, 2^989790732289 is an apocalyptic number.

It is an amenable number.

989790732289 is a deficient number, since it is larger than the sum of its proper divisors (23018389167).

989790732289 is a wasteful number, since it uses less digits than its factorization.

989790732289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23018389166.

The product of its (nonzero) digits is 246903552, while the sum is 73.

It can be divided in two parts, 9897907 and 32289, that added together give a triangular number (9930196 = T₄₄₅₆).

The spelling of 989790732289 in words is "nine hundred eighty-nine billion, seven hundred ninety million, seven hundred thirty-two thousand, two hundred eighty-nine".