65396539 has 16 divisors (see below), whose sum is σ = 72055872. Its totient is φ = 58987008.

The previous prime is 65396533. The next prime is 65396543. The reversal of 65396539 is 93569356.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 65396539 - 2¹¹ = 65394491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65396533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129762 + ... + 130264.

It is an arithmetic number, because the mean of its divisors is an integer number (4503492).

Almost surely, 2^65396539 is an apocalyptic number.

65396539 is a deficient number, since it is larger than the sum of its proper divisors (6659333).

65396539 is a wasteful number, since it uses less digits than its factorization.

65396539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726.

The product of its digits is 656100, while the sum is 46.

The square root of 65396539 is about 8086.8126601276. The cubic root of 65396539 is about 402.8885467829. Note that the first 3 decimals are identical.

The spelling of 65396539 in words is "sixty-five million, three hundred ninety-six thousand, five hundred thirty-nine".