647051338 has 8 divisors (see below), whose sum is σ = 996808932. Its totient is φ = 314781696.

The previous prime is 647051333. The next prime is 647051369. The reversal of 647051338 is 833150746.

It can be written as a sum of positive squares in 2 ways, for example, as 624650049 + 22401289 = 24993^2 + 4733^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a junction number, because it is equal to n+sod(n) for n = 647051297 and 647051306.

It is not an unprimeable number, because it can be changed into a prime (647051333) 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, 4371895 + ... + 4372042.

Almost surely, 2^647051338 is an apocalyptic number.

647051338 is a deficient number, since it is larger than the sum of its proper divisors (349757594).

647051338 is a wasteful number, since it uses less digits than its factorization.

647051338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8743976.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 647051338 is about 25437.2038164575. The cubic root of 647051338 is about 864.9272497204.

The spelling of 647051338 in words is "six hundred forty-seven million, fifty-one thousand, three hundred thirty-eight".