647397395 has 4 divisors (see below), whose sum is σ = 776876880. Its totient is φ = 517917912.

The previous prime is 647397391. The next prime is 647397409. The reversal of 647397395 is 593793746.

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 647397395 - 2² = 647397391 is a prime.

It is not an unprimeable number, because it can be changed into a prime (647397391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64739735 + ... + 64739744.

It is an arithmetic number, because the mean of its divisors is an integer number (194219220).

Almost surely, 2^647397395 is an apocalyptic number.

647397395 is a deficient number, since it is larger than the sum of its proper divisors (129479485).

647397395 is a wasteful number, since it uses less digits than its factorization.

647397395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129479484.

The product of its digits is 4286520, while the sum is 53.

The square root of 647397395 is about 25444.0050896080. The cubic root of 647397395 is about 865.0814161508.

The spelling of 647397395 in words is "six hundred forty-seven million, three hundred ninety-seven thousand, three hundred ninety-five".