2172973597 has 2 divisors, whose sum is σ = 2172973598. Its totient is φ = 2172973596.

The previous prime is 2172973573. The next prime is 2172973619. The reversal of 2172973597 is 7953792712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1678622841 + 494350756 = 40971^2 + 22234^2 .

It is a cyclic number.

It is not a de Polignac number, because 2172973597 - 2¹⁹ = 2172449309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2172973697) 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 as a sum of consecutive naturals, namely, 1086486798 + 1086486799.

It is an arithmetic number, because the mean of its divisors is an integer number (1086486799).

Almost surely, 2^2172973597 is an apocalyptic number.

It is an amenable number.

2172973597 is a deficient number, since it is larger than the sum of its proper divisors (1).

2172973597 is an equidigital number, since it uses as much as digits as its factorization.

2172973597 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1666980, while the sum is 52.

The square root of 2172973597 is about 46615.1648822569. The cubic root of 2172973597 is about 1295.2436837629.

The spelling of 2172973597 in words is "two billion, one hundred seventy-two million, nine hundred seventy-three thousand, five hundred ninety-seven".