647127051 has 8 divisors (see below), whose sum is σ = 863662800. Its totient is φ = 431004672.

The previous prime is 647127043. The next prime is 647127053. The reversal of 647127051 is 150721746.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 647127051 - 2³ = 647127043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (647127053) 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 7 ways as a sum of consecutive naturals, for example, 99670 + ... + 105963.

It is an arithmetic number, because the mean of its divisors is an integer number (107957850).

Almost surely, 2^647127051 is an apocalyptic number.

647127051 is a deficient number, since it is larger than the sum of its proper divisors (216535749).

647127051 is a wasteful number, since it uses less digits than its factorization.

647127051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206685.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 647127051 is about 25438.6920064692. The cubic root of 647127051 is about 864.9609841290.

Adding to 647127051 its reverse (150721746), we get a palindrome (797848797).

The spelling of 647127051 in words is "six hundred forty-seven million, one hundred twenty-seven thousand, fifty-one".