9129842609 has 2 divisors, whose sum is σ = 9129842610. Its totient is φ = 9129842608.

The previous prime is 9129842599. The next prime is 9129842693. The reversal of 9129842609 is 9062489219.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7809610384 + 1320232225 = 88372^2 + 36335^2 .

It is a cyclic number.

It is not a de Polignac number, because 9129842609 - 2¹⁶ = 9129777073 is a prime.

It is a super-2 number, since 2×9129842609² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9129802609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4564921304 + 4564921305.

It is an arithmetic number, because the mean of its divisors is an integer number (4564921305).

Almost surely, 2^9129842609 is an apocalyptic number.

It is an amenable number.

9129842609 is a deficient number, since it is larger than the sum of its proper divisors (1).

9129842609 is an equidigital number, since it uses as much as digits as its factorization.

9129842609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 559872, while the sum is 50.

The square root of 9129842609 is about 95550.2098846465. The cubic root of 9129842609 is about 2090.0391931937.

The spelling of 9129842609 in words is "nine billion, one hundred twenty-nine million, eight hundred forty-two thousand, six hundred nine".