145856173 has 2 divisors, whose sum is σ = 145856174. Its totient is φ = 145856172.

The previous prime is 145856171. The next prime is 145856197. The reversal of 145856173 is 371658541.

It is a happy number.

145856173 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139287204 + 6568969 = 11802^2 + 2563^2 .

It is a cyclic number.

It is not a de Polignac number, because 145856173 - 2¹ = 145856171 is a prime.

Together with 145856171, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145856171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72928086 + 72928087.

It is an arithmetic number, because the mean of its divisors is an integer number (72928087).

Almost surely, 2^145856173 is an apocalyptic number.

It is an amenable number.

145856173 is a deficient number, since it is larger than the sum of its proper divisors (1).

145856173 is an equidigital number, since it uses as much as digits as its factorization.

145856173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100800, while the sum is 40.

The square root of 145856173 is about 12077.0929035095. The cubic root of 145856173 is about 526.3907771413.

The spelling of 145856173 in words is "one hundred forty-five million, eight hundred fifty-six thousand, one hundred seventy-three".