2173722919 has 2 divisors, whose sum is σ = 2173722920. Its totient is φ = 2173722918.

The previous prime is 2173722853. The next prime is 2173722961. The reversal of 2173722919 is 9192273712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2173722919 - 2⁹ = 2173722407 is a prime.

It is a super-2 number, since 2×2173722919² = 9450142657171761122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2173722979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086861459 + 1086861460.

It is an arithmetic number, because the mean of its divisors is an integer number (1086861460).

Almost surely, 2^2173722919 is an apocalyptic number.

2173722919 is a deficient number, since it is larger than the sum of its proper divisors (1).

2173722919 is an equidigital number, since it uses as much as digits as its factorization.

2173722919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 95256, while the sum is 43.

The square root of 2173722919 is about 46623.2015095489. The cubic root of 2173722919 is about 1295.3925493618.

The spelling of 2173722919 in words is "two billion, one hundred seventy-three million, seven hundred twenty-two thousand, nine hundred nineteen".