65308409 has 2 divisors, whose sum is σ = 65308410. Its totient is φ = 65308408.

The previous prime is 65308381. The next prime is 65308433. The reversal of 65308409 is 90480356.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63552784 + 1755625 = 7972^2 + 1325^2 .

It is a cyclic number.

It is not a de Polignac number, because 65308409 - 2⁸ = 65308153 is a prime.

It is a super-2 number, since 2×65308409² = 8530376572222562, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65308459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32654204 + 32654205.

It is an arithmetic number, because the mean of its divisors is an integer number (32654205).

Almost surely, 2^65308409 is an apocalyptic number.

It is an amenable number.

65308409 is a deficient number, since it is larger than the sum of its proper divisors (1).

65308409 is an equidigital number, since it uses as much as digits as its factorization.

65308409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 65308409 is about 8081.3618283059. The cubic root of 65308409 is about 402.7074845536.

The spelling of 65308409 in words is "sixty-five million, three hundred eight thousand, four hundred nine".