173145983 has 2 divisors, whose sum is σ = 173145984. Its totient is φ = 173145982.

The previous prime is 173145971. The next prime is 173145991. The reversal of 173145983 is 389541371.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 173145983 - 2¹² = 173141887 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 173145983.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (173145913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86572991 + 86572992.

It is an arithmetic number, because the mean of its divisors is an integer number (86572992).

Almost surely, 2^173145983 is an apocalyptic number.

173145983 is a deficient number, since it is larger than the sum of its proper divisors (1).

173145983 is an equidigital number, since it uses as much as digits as its factorization.

173145983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 41.

The square root of 173145983 is about 13158.4947087423. The cubic root of 173145983 is about 557.3621508267.

The spelling of 173145983 in words is "one hundred seventy-three million, one hundred forty-five thousand, nine hundred eighty-three".