989813473 has 4 divisors (see below), whose sum is σ = 1079796528. Its totient is φ = 899830420.

The previous prime is 989813453. The next prime is 989813483. The reversal of 989813473 is 374318989.

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 989813473 - 2¹³ = 989805281 is a prime.

It is a super-2 number, since 2×989813473² = 1959461422664643458, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 989813473.

It is not an unprimeable number, because it can be changed into a prime (989813453) 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, 44991511 + ... + 44991532.

It is an arithmetic number, because the mean of its divisors is an integer number (269949132).

Almost surely, 2^989813473 is an apocalyptic number.

It is an amenable number.

989813473 is a deficient number, since it is larger than the sum of its proper divisors (89983055).

989813473 is a wasteful number, since it uses less digits than its factorization.

989813473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89983054.

The product of its digits is 1306368, while the sum is 52.

The square root of 989813473 is about 31461.3011968672. The cubic root of 989813473 is about 996.5928958248.

The spelling of 989813473 in words is "nine hundred eighty-nine million, eight hundred thirteen thousand, four hundred seventy-three".