9513989 has 2 divisors, whose sum is σ = 9513990. Its totient is φ = 9513988.

The previous prime is 9513979. The next prime is 9514013. The reversal of 9513989 is 9893159.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7745089 + 1768900 = 2783^2 + 1330^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9513989 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9513949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4756994 + 4756995.

It is an arithmetic number, because the mean of its divisors is an integer number (4756995).

Almost surely, 2^9513989 is an apocalyptic number.

It is an amenable number.

9513989 is a deficient number, since it is larger than the sum of its proper divisors (1).

9513989 is an equidigital number, since it uses as much as digits as its factorization.

9513989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87480, while the sum is 44.

The square root of 9513989 is about 3084.4754821525. The cubic root of 9513989 is about 211.8950842567.

The spelling of 9513989 in words is "nine million, five hundred thirteen thousand, nine hundred eighty-nine".