2109717447 has 16 divisors (see below), whose sum is σ = 2853339360. Its totient is φ = 1386312192.

The previous prime is 2109717427. The next prime is 2109717469. The reversal of 2109717447 is 7447179012.

It is not a de Polignac number, because 2109717447 - 2¹⁸ = 2109455303 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2109717399 and 2109717408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2109717427) 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, 606429 + ... + 609897.

It is an arithmetic number, because the mean of its divisors is an integer number (178333710).

Almost surely, 2^2109717447 is an apocalyptic number.

2109717447 is a deficient number, since it is larger than the sum of its proper divisors (743621913).

2109717447 is a wasteful number, since it uses less digits than its factorization.

2109717447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6322.

The product of its (nonzero) digits is 98784, while the sum is 42.

The square root of 2109717447 is about 45931.6606166161. The cubic root of 2109717447 is about 1282.5513578680.

The spelling of 2109717447 in words is "two billion, one hundred nine million, seven hundred seventeen thousand, four hundred forty-seven".