145023017173 has 2 divisors, whose sum is σ = 145023017174. Its totient is φ = 145023017172.

The previous prime is 145023017143. The next prime is 145023017177. The reversal of 145023017173 is 371710320541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115666649604 + 29356367569 = 340098^2 + 171337^2 .

It is a cyclic number.

It is not a de Polignac number, because 145023017173 - 2⁹ = 145023016661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145023017177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72511508586 + 72511508587.

It is an arithmetic number, because the mean of its divisors is an integer number (72511508587).

Almost surely, 2^145023017173 is an apocalyptic number.

It is an amenable number.

145023017173 is a deficient number, since it is larger than the sum of its proper divisors (1).

145023017173 is an equidigital number, since it uses as much as digits as its factorization.

145023017173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17640, while the sum is 34.

The spelling of 145023017173 in words is "one hundred forty-five billion, twenty-three million, seventeen thousand, one hundred seventy-three".