988643329 has 4 divisors (see below), whose sum is σ = 988748800. Its totient is φ = 988537860.

The previous prime is 988643323. The next prime is 988643371. The reversal of 988643329 is 923346889.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 988643329 - 2⁹ = 988642817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (988643323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37137 + ... + 57934.

It is an arithmetic number, because the mean of its divisors is an integer number (247187200).

It is a Proth number, since it is equal to 30171 ⋅ 2¹⁵ + 1 and 30171 < 2¹⁵.

Almost surely, 2^988643329 is an apocalyptic number.

It is an amenable number.

988643329 is a deficient number, since it is larger than the sum of its proper divisors (105471).

988643329 is a wasteful number, since it uses less digits than its factorization.

988643329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105470.

The product of its digits is 2239488, while the sum is 52.

The square root of 988643329 is about 31442.6991366835. The cubic root of 988643329 is about 996.2000214534.

The spelling of 988643329 in words is "nine hundred eighty-eight million, six hundred forty-three thousand, three hundred twenty-nine".