647299 has 4 divisors (see below), whose sum is σ = 650880. Its totient is φ = 643720.

The previous prime is 647293. The next prime is 647303. The reversal of 647299 is 992746.

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

It is a cyclic number.

It is not a de Polignac number, because 647299 - 2¹⁵ = 614531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (647293) 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, 1504 + ... + 1885.

It is an arithmetic number, because the mean of its divisors is an integer number (162720).

2⁶⁴⁷²⁹⁹ is an apocalyptic number.

647299 is a deficient number, since it is larger than the sum of its proper divisors (3581).

647299 is a wasteful number, since it uses less digits than its factorization.

647299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3580.

The product of its digits is 27216, while the sum is 37.

The square root of 647299 is about 804.5489419544. The cubic root of 647299 is about 86.5037587327.

It can be divided in two parts, 647 and 299, that added together give a triangular number (946 = T₄₃).

The spelling of 647299 in words is "six hundred forty-seven thousand, two hundred ninety-nine".