647055445 has 32 divisors (see below), whose sum is σ = 848510208. Its totient is φ = 471702528.

The previous prime is 647055427. The next prime is 647055449. The reversal of 647055445 is 544550746.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 647055445 - 2⁵ = 647055413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 647055398 and 647055407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647055449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 889672 + ... + 890398.

It is an arithmetic number, because the mean of its divisors is an integer number (26515944).

Almost surely, 2^647055445 is an apocalyptic number.

It is an amenable number.

647055445 is a deficient number, since it is larger than the sum of its proper divisors (201454763).

647055445 is a wasteful number, since it uses less digits than its factorization.

647055445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069.

The product of its (nonzero) digits is 336000, while the sum is 40.

The square root of 647055445 is about 25437.2845445421. The cubic root of 647055445 is about 864.9290796878.

The spelling of 647055445 in words is "six hundred forty-seven million, fifty-five thousand, four hundred forty-five".