65190509 has 2 divisors, whose sum is σ = 65190510. Its totient is φ = 65190508.

The previous prime is 65190493. The next prime is 65190553. The reversal of 65190509 is 90509156.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51337225 + 13853284 = 7165^2 + 3722^2 .

It is a cyclic number.

It is not a de Polignac number, because 65190509 - 2⁴ = 65190493 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 (65190409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32595254 + 32595255.

It is an arithmetic number, because the mean of its divisors is an integer number (32595255).

Almost surely, 2^65190509 is an apocalyptic number.

It is an amenable number.

65190509 is a deficient number, since it is larger than the sum of its proper divisors (1).

65190509 is an equidigital number, since it uses as much as digits as its factorization.

65190509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12150, while the sum is 35.

The square root of 65190509 is about 8074.0639705170. The cubic root of 65190509 is about 402.4650052520.

The spelling of 65190509 in words is "sixty-five million, one hundred ninety thousand, five hundred nine".