647135949 has 8 divisors (see below), whose sum is σ = 863999872. Its totient is φ = 430848000.

The previous prime is 647135947. The next prime is 647136001. The reversal of 647135949 is 949531746.

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

It is not a de Polignac number, because 647135949 - 2¹ = 647135947 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 647135898 and 647135907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647135941) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 141364 + ... + 145869.

It is an arithmetic number, because the mean of its divisors is an integer number (107999984).

Almost surely, 2^647135949 is an apocalyptic number.

It is an amenable number.

647135949 is a deficient number, since it is larger than the sum of its proper divisors (216863923).

647135949 is a wasteful number, since it uses less digits than its factorization.

647135949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287987.

The product of its digits is 816480, while the sum is 48.

The square root of 647135949 is about 25438.8668969355. The cubic root of 647135949 is about 864.9649485167.

The spelling of 647135949 in words is "six hundred forty-seven million, one hundred thirty-five thousand, nine hundred forty-nine".