145173639 has 16 divisors (see below), whose sum is σ = 211097600. Its totient is φ = 88204896.

The previous prime is 145173617. The next prime is 145173649. The reversal of 145173639 is 936371541.

It is not a de Polignac number, because 145173639 - 2⁸ = 145173383 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145173597 and 145173606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145173649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20479 + ... + 26640.

It is an arithmetic number, because the mean of its divisors is an integer number (13193600).

Almost surely, 2^145173639 is an apocalyptic number.

145173639 is a deficient number, since it is larger than the sum of its proper divisors (65923961).

145173639 is a wasteful number, since it uses less digits than its factorization.

145173639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47214.

The product of its digits is 68040, while the sum is 39.

The square root of 145173639 is about 12048.8023886194. The cubic root of 145173639 is about 525.5684111235.

The spelling of 145173639 in words is "one hundred forty-five million, one hundred seventy-three thousand, six hundred thirty-nine".