647140001 has 4 divisors (see below), whose sum is σ = 650493252. Its totient is φ = 643786752.

The previous prime is 647139991. The next prime is 647140007. The reversal of 647140001 is 100041746.

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

It can be written as a sum of positive squares in 2 ways, for example, as 67486225 + 579653776 = 8215^2 + 24076^2 .

It is a cyclic number.

It is not a de Polignac number, because 647140001 - 2¹⁰ = 647138977 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 (647140007) 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, 1676336 + ... + 1676721.

It is an arithmetic number, because the mean of its divisors is an integer number (162623313).

Almost surely, 2^647140001 is an apocalyptic number.

It is an amenable number.

647140001 is a deficient number, since it is larger than the sum of its proper divisors (3353251).

647140001 is a wasteful number, since it uses less digits than its factorization.

647140001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3353250.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 647140001 is about 25438.9465387229. The cubic root of 647140001 is about 864.9667538204.

Adding to 647140001 its reverse (100041746), we get a palindrome (747181747).

The spelling of 647140001 in words is "six hundred forty-seven million, one hundred forty thousand, one".