65090009 has 2 divisors, whose sum is σ = 65090010. Its totient is φ = 65090008.

The previous prime is 65089979. The next prime is 65090017. The reversal of 65090009 is 90009056.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45091225 + 19998784 = 6715^2 + 4472^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65090009 is a prime.

It is a super-3 number, since 3×65090009³ (a number of 24 digits) contains 333 as substring.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (65090099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32545004 + 32545005.

It is an arithmetic number, because the mean of its divisors is an integer number (32545005).

Almost surely, 2^65090009 is an apocalyptic number.

It is an amenable number.

65090009 is a deficient number, since it is larger than the sum of its proper divisors (1).

65090009 is an equidigital number, since it uses as much as digits as its factorization.

65090009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 65090009 is about 8067.8379383823. The cubic root of 65090009 is about 402.2580807743.

The spelling of 65090009 in words is "sixty-five million, ninety thousand, nine".