65497913 has 8 divisors (see below), whose sum is σ = 70610568. Its totient is φ = 60395904.

The previous prime is 65497907. The next prime is 65497937. The reversal of 65497913 is 31979456.

It can be written as a sum of positive squares in 4 ways, for example, as 727609 + 64770304 = 853^2 + 8048^2 .

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 65497913 - 2⁶ = 65497849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65497903) 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 7 ways as a sum of consecutive naturals, for example, 14045 + ... + 18117.

It is an arithmetic number, because the mean of its divisors is an integer number (8826321).

Almost surely, 2^65497913 is an apocalyptic number.

It is an amenable number.

65497913 is a deficient number, since it is larger than the sum of its proper divisors (5112655).

65497913 is a wasteful number, since it uses less digits than its factorization.

65497913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5323.

The product of its digits is 204120, while the sum is 44.

The square root of 65497913 is about 8093.0780918017. The cubic root of 65497913 is about 403.0966176200.

The spelling of 65497913 in words is "sixty-five million, four hundred ninety-seven thousand, nine hundred thirteen".