145616173 has 2 divisors, whose sum is σ = 145616174. Its totient is φ = 145616172.

The previous prime is 145616161. The next prime is 145616179. The reversal of 145616173 is 371616541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108430569 + 37185604 = 10413^2 + 6098^2 .

It is an emirp because it is prime and its reverse (371616541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145616173 - 2⁹ = 145615661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145616179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72808086 + 72808087.

It is an arithmetic number, because the mean of its divisors is an integer number (72808087).

Almost surely, 2^145616173 is an apocalyptic number.

It is an amenable number.

145616173 is a deficient number, since it is larger than the sum of its proper divisors (1).

145616173 is an equidigital number, since it uses as much as digits as its factorization.

145616173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 34.

The square root of 145616173 is about 12067.1526467514. The cubic root of 145616173 is about 526.1019009158.

The spelling of 145616173 in words is "one hundred forty-five million, six hundred sixteen thousand, one hundred seventy-three".