73173745 has 16 divisors (see below), whose sum is σ = 90332352. Its totient is φ = 56871360.

The previous prime is 73173739. The next prime is 73173767. The reversal of 73173745 is 54737137.

It is not a de Polignac number, because 73173745 - 2¹⁹ = 72649457 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 44559 + ... + 46171.

It is an arithmetic number, because the mean of its divisors is an integer number (5645772).

Almost surely, 2^73173745 is an apocalyptic number.

It is an amenable number.

73173745 is a deficient number, since it is larger than the sum of its proper divisors (17158607).

73173745 is a wasteful number, since it uses less digits than its factorization.

73173745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1872.

The product of its digits is 61740, while the sum is 37.

The square root of 73173745 is about 8554.1653596362. The cubic root of 73173745 is about 418.2652273834.

The spelling of 73173745 in words is "seventy-three million, one hundred seventy-three thousand, seven hundred forty-five".