647534122 has 4 divisors (see below), whose sum is σ = 971301186. Its totient is φ = 323767060.

The previous prime is 647534113. The next prime is 647534137. The reversal of 647534122 is 221435746.

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

It can be written as a sum of positive squares in only one way, i.e., 460145401 + 187388721 = 21451^2 + 13689^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161883529 + ... + 161883532.

Almost surely, 2^647534122 is an apocalyptic number.

647534122 is a deficient number, since it is larger than the sum of its proper divisors (323767064).

647534122 is a wasteful number, since it uses less digits than its factorization.

647534122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323767063.

The product of its digits is 40320, while the sum is 34.

The square root of 647534122 is about 25446.6917692654. The cubic root of 647534122 is about 865.1423121126.

Adding to 647534122 its reverse (221435746), we get a palindrome (868969868).

The spelling of 647534122 in words is "six hundred forty-seven million, five hundred thirty-four thousand, one hundred twenty-two".