2173939174157 has 2 divisors, whose sum is σ = 2173939174158. Its totient is φ = 2173939174156.

The previous prime is 2173939174153. The next prime is 2173939174189. The reversal of 2173939174157 is 7514719393712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1848093426916 + 325845747241 = 1359446^2 + 570829^2 .

It is a cyclic number.

It is not a de Polignac number, because 2173939174157 - 2² = 2173939174153 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2173939174096 and 2173939174105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2173939174153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086969587078 + 1086969587079.

It is an arithmetic number, because the mean of its divisors is an integer number (1086969587079).

Almost surely, 2^{2173939174157} is an apocalyptic number.

It is an amenable number.

2173939174157 is a deficient number, since it is larger than the sum of its proper divisors (1).

2173939174157 is an equidigital number, since it uses as much as digits as its factorization.

2173939174157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10001880, while the sum is 59.

The spelling of 2173939174157 in words is "two trillion, one hundred seventy-three billion, nine hundred thirty-nine million, one hundred seventy-four thousand, one hundred fifty-seven".