647287049 has 16 divisors (see below), whose sum is σ = 676045440. Its totient is φ = 619248000.

The previous prime is 647287013. The next prime is 647287057. The reversal of 647287049 is 940782746.

It is a cyclic number.

It is not a de Polignac number, because 647287049 - 2⁸ = 647286793 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 647286994 and 647287012.

It is not an unprimeable number, because it can be changed into a prime (647286049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 666134 + ... + 667104.

It is an arithmetic number, because the mean of its divisors is an integer number (42252840).

Almost surely, 2^647287049 is an apocalyptic number.

It is an amenable number.

647287049 is a deficient number, since it is larger than the sum of its proper divisors (28758391).

647287049 is a wasteful number, since it uses less digits than its factorization.

647287049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312.

The product of its (nonzero) digits is 677376, while the sum is 47.

The square root of 647287049 is about 25441.8365885798. The cubic root of 647287049 is about 865.0322636011.

The spelling of 647287049 in words is "six hundred forty-seven million, two hundred eighty-seven thousand, forty-nine".