73973173 has 2 divisors, whose sum is σ = 73973174. Its totient is φ = 73973172.

The previous prime is 73973111. The next prime is 73973189. The reversal of 73973173 is 37137937.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52969284 + 21003889 = 7278^2 + 4583^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73973173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73973573) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36986586 + 36986587.

It is an arithmetic number, because the mean of its divisors is an integer number (36986587).

Almost surely, 2^73973173 is an apocalyptic number.

It is an amenable number.

73973173 is a deficient number, since it is larger than the sum of its proper divisors (1).

73973173 is an equidigital number, since it uses as much as digits as its factorization.

73973173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 83349, while the sum is 40.

The square root of 73973173 is about 8600.7658379937. The cubic root of 73973173 is about 419.7829055677.

The spelling of 73973173 in words is "seventy-three million, nine hundred seventy-three thousand, one hundred seventy-three".