989470913 has 2 divisors, whose sum is σ = 989470914. Its totient is φ = 989470912.

The previous prime is 989470891. The next prime is 989470919. The reversal of 989470913 is 319074989.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 988976704 + 494209 = 31448^2 + 703^2 .

It is a cyclic number.

It is not a de Polignac number, because 989470913 - 2¹⁸ = 989208769 is a prime.

It is not a weakly prime, because it can be changed into another prime (989470919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494735456 + 494735457.

It is an arithmetic number, because the mean of its divisors is an integer number (494735457).

Almost surely, 2^989470913 is an apocalyptic number.

It is an amenable number.

989470913 is a deficient number, since it is larger than the sum of its proper divisors (1).

989470913 is an equidigital number, since it uses as much as digits as its factorization.

989470913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 989470913 is about 31455.8565771145. The cubic root of 989470913 is about 996.4779138061.

The spelling of 989470913 in words is "nine hundred eighty-nine million, four hundred seventy thousand, nine hundred thirteen".