9081516989 has 2 divisors, whose sum is σ = 9081516990. Its totient is φ = 9081516988.

The previous prime is 9081516979. The next prime is 9081517019. The reversal of 9081516989 is 9896151809.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7008536089 + 2072980900 = 83717^2 + 45530^2 .

It is a cyclic number.

It is not a de Polignac number, because 9081516989 - 2⁴ = 9081516973 is a prime.

It is a super-2 number, since 2×9081516989² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9081516979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4540758494 + 4540758495.

It is an arithmetic number, because the mean of its divisors is an integer number (4540758495).

Almost surely, 2^9081516989 is an apocalyptic number.

It is an amenable number.

9081516989 is a deficient number, since it is larger than the sum of its proper divisors (1).

9081516989 is an equidigital number, since it uses as much as digits as its factorization.

9081516989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1399680, while the sum is 56.

The square root of 9081516989 is about 95296.9935989588. The cubic root of 9081516989 is about 2086.3450377716.

The spelling of 9081516989 in words is "nine billion, eighty-one million, five hundred sixteen thousand, nine hundred eighty-nine".