2172970547 has 4 divisors (see below), whose sum is σ = 2370513336. Its totient is φ = 1975427760.

The previous prime is 2172970417. The next prime is 2172970559. The reversal of 2172970547 is 7450792712.

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 2172970547 - 2⁸ = 2172970291 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2172970498 and 2172970507.

It is not an unprimeable number, because it can be changed into a prime (2172970577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98771378 + ... + 98771399.

It is an arithmetic number, because the mean of its divisors is an integer number (592628334).

Almost surely, 2^2172970547 is an apocalyptic number.

2172970547 is a deficient number, since it is larger than the sum of its proper divisors (197542789).

2172970547 is a wasteful number, since it uses less digits than its factorization.

2172970547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197542788.

The product of its (nonzero) digits is 246960, while the sum is 44.

The square root of 2172970547 is about 46615.1321675698. The cubic root of 2172970547 is about 1295.2430777584.

The spelling of 2172970547 in words is "two billion, one hundred seventy-two million, nine hundred seventy thousand, five hundred forty-seven".