64320297 has 4 divisors (see below), whose sum is σ = 85760400. Its totient is φ = 42880196.

The previous prime is 64320287. The next prime is 64320313. The reversal of 64320297 is 79202346.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64320297 - 2⁴ = 64320281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64320287) 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, 10720047 + ... + 10720052.

It is an arithmetic number, because the mean of its divisors is an integer number (21440100).

Almost surely, 2^64320297 is an apocalyptic number.

It is an amenable number.

64320297 is a deficient number, since it is larger than the sum of its proper divisors (21440103).

64320297 is a wasteful number, since it uses less digits than its factorization.

64320297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21440102.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 64320297 is about 8019.9935785510. The cubic root of 64320297 is about 400.6661753268. Note that the first 3 decimals are identical.

The spelling of 64320297 in words is "sixty-four million, three hundred twenty thousand, two hundred ninety-seven".