989945351 has 8 divisors (see below), whose sum is σ = 1029235200. Its totient is φ = 951115320.

The previous prime is 989945317. The next prime is 989945371. The reversal of 989945351 is 153549989.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-989945351 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 989945293 and 989945302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989945311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110561 + ... + 119178.

It is an arithmetic number, because the mean of its divisors is an integer number (128654400).

Almost surely, 2^989945351 is an apocalyptic number.

989945351 is a deficient number, since it is larger than the sum of its proper divisors (39289849).

989945351 is a wasteful number, since it uses less digits than its factorization.

989945351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229909.

The product of its digits is 1749600, while the sum is 53.

The square root of 989945351 is about 31463.3970035023. The cubic root of 989945351 is about 996.6371542785.

The spelling of 989945351 in words is "nine hundred eighty-nine million, nine hundred forty-five thousand, three hundred fifty-one".