989455 has 4 divisors (see below), whose sum is σ = 1187352. Its totient is φ = 791560.

The previous prime is 989441. The next prime is 989467. The reversal of 989455 is 554989.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 554989 = 739 ⋅751.

It is not a de Polignac number, because 989455 - 2⁵ = 989423 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 989455.

It is an unprimeable number.

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, 98941 + ... + 98950.

It is an arithmetic number, because the mean of its divisors is an integer number (296838).

2⁹⁸⁹⁴⁵⁵ is an apocalyptic number.

989455 is a deficient number, since it is larger than the sum of its proper divisors (197897).

989455 is a wasteful number, since it uses less digits than its factorization.

989455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197896.

The product of its digits is 64800, while the sum is 40.

The square root of 989455 is about 994.7135265995. The cubic root of 989455 is about 99.6472571881.

It can be divided in two parts, 989 and 455, that added together give a square (1444 = 38²).

The spelling of 989455 in words is "nine hundred eighty-nine thousand, four hundred fifty-five".