989664406 has 4 divisors (see below), whose sum is σ = 1484496612. Its totient is φ = 494832202.

The previous prime is 989664397. The next prime is 989664409. The reversal of 989664406 is 604466989.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989664409) 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, 247416100 + ... + 247416103.

It is an arithmetic number, because the mean of its divisors is an integer number (371124153).

Almost surely, 2^989664406 is an apocalyptic number.

989664406 is a deficient number, since it is larger than the sum of its proper divisors (494832206).

989664406 is a wasteful number, since it uses less digits than its factorization.

989664406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494832205.

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

The square root of 989664406 is about 31458.9320543467. The cubic root of 989664406 is about 996.5428639836.

The spelling of 989664406 in words is "nine hundred eighty-nine million, six hundred sixty-four thousand, four hundred six".