6347645 has 4 divisors (see below), whose sum is σ = 7617180. Its totient is φ = 5078112.

The previous prime is 6347641. The next prime is 6347657. The reversal of 6347645 is 5467436.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4481689 + 1865956 = 2117^2 + 1366^2 .

It is a cyclic number.

It is not a de Polignac number, because 6347645 - 2² = 6347641 is a prime.

It is a d-powerful number, because it can be written as 6 + 3¹³ + 4⁹ + 7⁵ + 6⁷ + 4¹¹ + 5³ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6347641) 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, 634760 + ... + 634769.

It is an arithmetic number, because the mean of its divisors is an integer number (1904295).

Almost surely, 2^6347645 is an apocalyptic number.

It is an amenable number.

6347645 is a deficient number, since it is larger than the sum of its proper divisors (1269535).

6347645 is a wasteful number, since it uses less digits than its factorization.

6347645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1269534.

The product of its digits is 60480, while the sum is 35.

The square root of 6347645 is about 2519.4533137171. The cubic root of 6347645 is about 185.1558948909.

The spelling of 6347645 in words is "six million, three hundred forty-seven thousand, six hundred forty-five".