989331479 has 2 divisors, whose sum is σ = 989331480. Its totient is φ = 989331478.

The previous prime is 989331451. The next prime is 989331521. The reversal of 989331479 is 974133989.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-989331479 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 989331479.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989331979) 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 as a sum of consecutive naturals, namely, 494665739 + 494665740.

It is an arithmetic number, because the mean of its divisors is an integer number (494665740).

Almost surely, 2^989331479 is an apocalyptic number.

989331479 is a deficient number, since it is larger than the sum of its proper divisors (1).

989331479 is an equidigital number, since it uses as much as digits as its factorization.

989331479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1469664, while the sum is 53.

The square root of 989331479 is about 31453.6401549964. The cubic root of 989331479 is about 996.4311044704.

The spelling of 989331479 in words is "nine hundred eighty-nine million, three hundred thirty-one thousand, four hundred seventy-nine".