65405539 has 2 divisors, whose sum is σ = 65405540. Its totient is φ = 65405538.

The previous prime is 65405531. The next prime is 65405563. The reversal of 65405539 is 93550456.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65405539 - 2³ = 65405531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65405498 and 65405507.

It is not a weakly prime, because it can be changed into another prime (65405531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32702769 + 32702770.

It is an arithmetic number, because the mean of its divisors is an integer number (32702770).

Almost surely, 2^65405539 is an apocalyptic number.

65405539 is a deficient number, since it is larger than the sum of its proper divisors (1).

65405539 is an equidigital number, since it uses as much as digits as its factorization.

65405539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81000, while the sum is 37.

The square root of 65405539 is about 8087.3691024956. The cubic root of 65405539 is about 402.9070280392.

The spelling of 65405539 in words is "sixty-five million, four hundred five thousand, five hundred thirty-nine".