65390539 has 4 divisors (see below), whose sum is σ = 65406960. Its totient is φ = 65374120.

The previous prime is 65390537. The next prime is 65390543. The reversal of 65390539 is 93509356.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 65390539 - 2¹ = 65390537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65390537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1977 + ... + 11605.

It is an arithmetic number, because the mean of its divisors is an integer number (16351740).

Almost surely, 2^65390539 is an apocalyptic number.

65390539 is a deficient number, since it is larger than the sum of its proper divisors (16421).

65390539 is an equidigital number, since it uses as much as digits as its factorization.

65390539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16420.

The product of its (nonzero) digits is 109350, while the sum is 40.

The square root of 65390539 is about 8086.4416772768. The cubic root of 65390539 is about 402.8762250034.

The spelling of 65390539 in words is "sixty-five million, three hundred ninety thousand, five hundred thirty-nine".