65061509 has 2 divisors, whose sum is σ = 65061510. Its totient is φ = 65061508.

The previous prime is 65061497. The next prime is 65061527. The reversal of 65061509 is 90516056.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40360609 + 24700900 = 6353^2 + 4970^2 .

It is a cyclic number.

It is not a de Polignac number, because 65061509 - 2⁸ = 65061253 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65061559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32530754 + 32530755.

It is an arithmetic number, because the mean of its divisors is an integer number (32530755).

Almost surely, 2^65061509 is an apocalyptic number.

It is an amenable number.

65061509 is a deficient number, since it is larger than the sum of its proper divisors (1).

65061509 is an equidigital number, since it uses as much as digits as its factorization.

65061509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 65061509 is about 8066.0714725323. The cubic root of 65061509 is about 402.1993619370.

The spelling of 65061509 in words is "sixty-five million, sixty-one thousand, five hundred nine".