647049 has 16 divisors (see below), whose sum is σ = 951552. Its totient is φ = 388608.

The previous prime is 647047. The next prime is 647057. The reversal of 647049 is 940746.

It is not a de Polignac number, because 647049 - 2¹ = 647047 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (647047) 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, 1657 + ... + 2009.

It is an arithmetic number, because the mean of its divisors is an integer number (59472).

2⁶⁴⁷⁰⁴⁹ is an apocalyptic number.

It is an amenable number.

647049 is a deficient number, since it is larger than the sum of its proper divisors (304503).

647049 is a wasteful number, since it uses less digits than its factorization.

647049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 647049 is about 804.3935603919. The cubic root of 647049 is about 86.4926207968.

The spelling of 647049 in words is "six hundred forty-seven thousand, forty-nine".