989116379957 has 2 divisors, whose sum is σ = 989116379958. Its totient is φ = 989116379956.

The previous prime is 989116379947. The next prime is 989116380019. The reversal of 989116379957 is 759973611989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 986050986001 + 3065393956 = 993001^2 + 55366^2 .

It is a cyclic number.

It is not a de Polignac number, because 989116379957 - 2⁶ = 989116379893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989116379947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494558189978 + 494558189979.

It is an arithmetic number, because the mean of its divisors is an integer number (494558189979).

Almost surely, 2^989116379957 is an apocalyptic number.

It is an amenable number.

989116379957 is a deficient number, since it is larger than the sum of its proper divisors (1).

989116379957 is an equidigital number, since it uses as much as digits as its factorization.

989116379957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 231472080, while the sum is 74.

The spelling of 989116379957 in words is "nine hundred eighty-nine billion, one hundred sixteen million, three hundred seventy-nine thousand, nine hundred fifty-seven".