2172894497 has 4 divisors (see below), whose sum is σ = 2175706260. Its totient is φ = 2170082736.

The previous prime is 2172894463. The next prime is 2172894499. The reversal of 2172894497 is 7944982712.

It is a happy number.

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 154728721 + 2018165776 = 12439^2 + 44924^2 .

It is a cyclic number.

It is not a de Polignac number, because 2172894497 - 2²⁴ = 2156117281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2172894499) 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, 1404722 + ... + 1406267.

It is an arithmetic number, because the mean of its divisors is an integer number (543926565).

Almost surely, 2^2172894497 is an apocalyptic number.

It is an amenable number.

2172894497 is a deficient number, since it is larger than the sum of its proper divisors (2811763).

2172894497 is an equidigital number, since it uses as much as digits as its factorization.

2172894497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2811762.

The product of its digits is 2032128, while the sum is 53.

The square root of 2172894497 is about 46614.3164381931. The cubic root of 2172894497 is about 1295.2279672015.

The spelling of 2172894497 in words is "two billion, one hundred seventy-two million, eight hundred ninety-four thousand, four hundred ninety-seven".