65609449 has 2 divisors, whose sum is σ = 65609450. Its totient is φ = 65609448.

The previous prime is 65609441. The next prime is 65609483. The reversal of 65609449 is 94490656.

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., 61779600 + 3829849 = 7860^2 + 1957^2 .

It is a cyclic number.

It is not a de Polignac number, because 65609449 - 2³ = 65609441 is a prime.

It is not a weakly prime, because it can be changed into another prime (65609441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32804724 + 32804725.

It is an arithmetic number, because the mean of its divisors is an integer number (32804725).

Almost surely, 2^65609449 is an apocalyptic number.

It is an amenable number.

65609449 is a deficient number, since it is larger than the sum of its proper divisors (1).

65609449 is an equidigital number, since it uses as much as digits as its factorization.

65609449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 65609449 is about 8099.9659875829. The cubic root of 65609449 is about 403.3252981271.

The spelling of 65609449 in words is "sixty-five million, six hundred nine thousand, four hundred forty-nine".