65408197 has 8 divisors (see below), whose sum is σ = 69370776. Its totient is φ = 61458432.

The previous prime is 65408183. The next prime is 65408209. The reversal of 65408197 is 79180456.

65408197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 14699556 + 50708641 = 3834^2 + 7121^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65408197 - 2⁷ = 65408069 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 (65408107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8583 + ... + 14299.

It is an arithmetic number, because the mean of its divisors is an integer number (8671347).

Almost surely, 2^65408197 is an apocalyptic number.

It is an amenable number.

65408197 is a deficient number, since it is larger than the sum of its proper divisors (3962579).

65408197 is a wasteful number, since it uses less digits than its factorization.

65408197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6407.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 65408197 is about 8087.5334311519. The cubic root of 65408197 is about 402.9124858460.

The spelling of 65408197 in words is "sixty-five million, four hundred eight thousand, one hundred ninety-seven".