647372445 has 8 divisors (see below), whose sum is σ = 1035795936. Its totient is φ = 345265296.

The previous prime is 647372413. The next prime is 647372483. The reversal of 647372445 is 544273746.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 647372445 - 2⁵ = 647372413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 647372397 and 647372406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21579067 + ... + 21579096.

It is an arithmetic number, because the mean of its divisors is an integer number (129474492).

Almost surely, 2^647372445 is an apocalyptic number.

It is an amenable number.

647372445 is a deficient number, since it is larger than the sum of its proper divisors (388423491).

647372445 is a wasteful number, since it uses less digits than its factorization.

647372445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43158171.

The product of its digits is 564480, while the sum is 42.

The square root of 647372445 is about 25443.5147925753. The cubic root of 647372445 is about 865.0703029053.

The spelling of 647372445 in words is "six hundred forty-seven million, three hundred seventy-two thousand, four hundred forty-five".