989890451 has 8 divisors (see below), whose sum is σ = 1088385024. Its totient is φ = 892813320.

The previous prime is 989890441. The next prime is 989890457. The reversal of 989890451 is 154098989.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 989890451 - 2²² = 985696147 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 989890393 and 989890402.

It is not an unprimeable number, because it can be changed into a prime (989890457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 352895 + ... + 355688.

It is an arithmetic number, because the mean of its divisors is an integer number (136048128).

Almost surely, 2^989890451 is an apocalyptic number.

989890451 is a deficient number, since it is larger than the sum of its proper divisors (98494573).

989890451 is a wasteful number, since it uses less digits than its factorization.

989890451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708721.

The product of its (nonzero) digits is 933120, while the sum is 53.

The square root of 989890451 is about 31462.5245490568. The cubic root of 989890451 is about 996.6187302341.

The spelling of 989890451 in words is "nine hundred eighty-nine million, eight hundred ninety thousand, four hundred fifty-one".