65340389 has 4 divisors (see below), whose sum is σ = 65406924. Its totient is φ = 65273856.

The previous prime is 65340383. The next prime is 65340391. The reversal of 65340389 is 98304356.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 62884900 + 2455489 = 7930^2 + 1567^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65340389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65340383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31772 + ... + 33765.

It is an arithmetic number, because the mean of its divisors is an integer number (16351731).

Almost surely, 2^65340389 is an apocalyptic number.

It is an amenable number.

65340389 is a deficient number, since it is larger than the sum of its proper divisors (66535).

65340389 is an equidigital number, since it uses as much as digits as its factorization.

65340389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66534.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 65340389 is about 8083.3402130555. The cubic root of 65340389 is about 402.7732059720.

The spelling of 65340389 in words is "sixty-five million, three hundred forty thousand, three hundred eighty-nine".