989506417 has 4 divisors (see below), whose sum is σ = 989733376. Its totient is φ = 989279460.

The previous prime is 989506381. The next prime is 989506421. The reversal of 989506417 is 714605989.

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 a de Polignac number, because none of the positive numbers 2^k-989506417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (989506447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106809 + ... + 115702.

It is an arithmetic number, because the mean of its divisors is an integer number (247433344).

Almost surely, 2^989506417 is an apocalyptic number.

It is an amenable number.

989506417 is a deficient number, since it is larger than the sum of its proper divisors (226959).

989506417 is a wasteful number, since it uses less digits than its factorization.

989506417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226958.

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 989506417 is about 31456.4209184707. The cubic root of 989506417 is about 996.4898321382.

The spelling of 989506417 in words is "nine hundred eighty-nine million, five hundred six thousand, four hundred seventeen".