65297147 has 4 divisors (see below), whose sum is σ = 66686496. Its totient is φ = 63907800.

The previous prime is 65297143. The next prime is 65297149. The reversal of 65297147 is 74179256.

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

It is a cyclic number.

It is not a de Polignac number, because 65297147 - 2² = 65297143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65297143) 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, 694604 + ... + 694697.

It is an arithmetic number, because the mean of its divisors is an integer number (16671624).

Almost surely, 2^65297147 is an apocalyptic number.

65297147 is a deficient number, since it is larger than the sum of its proper divisors (1389349).

65297147 is a wasteful number, since it uses less digits than its factorization.

65297147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1389348.

The product of its digits is 105840, while the sum is 41.

The square root of 65297147 is about 8080.6650097625. The cubic root of 65297147 is about 402.6843351487.

The spelling of 65297147 in words is "sixty-five million, two hundred ninety-seven thousand, one hundred forty-seven".