647397401 has 16 divisors (see below), whose sum is σ = 751939200. Its totient is φ = 545942400.

The previous prime is 647397391. The next prime is 647397409. The reversal of 647397401 is 104793746.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-647397401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (647397409) 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 15 ways as a sum of consecutive naturals, for example, 108701 + ... + 114501.

It is an arithmetic number, because the mean of its divisors is an integer number (46996200).

Almost surely, 2^647397401 is an apocalyptic number.

It is an amenable number.

647397401 is a deficient number, since it is larger than the sum of its proper divisors (104541799).

647397401 is a wasteful number, since it uses less digits than its factorization.

647397401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6064.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 647397401 is about 25444.0052075140. The cubic root of 647397401 is about 865.0814188233.

The spelling of 647397401 in words is "six hundred forty-seven million, three hundred ninety-seven thousand, four hundred one".