73129373 has 4 divisors (see below), whose sum is σ = 73149180. Its totient is φ = 73109568.

The previous prime is 73129339. The next prime is 73129411. The reversal of 73129373 is 37392137.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 70930084 + 2199289 = 8422^2 + 1483^2 .

It is a cyclic number.

It is not a de Polignac number, because 73129373 - 2¹⁴ = 73112989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73129313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2540 + ... + 12357.

It is an arithmetic number, because the mean of its divisors is an integer number (18287295).

Almost surely, 2^73129373 is an apocalyptic number.

It is an amenable number.

73129373 is a deficient number, since it is larger than the sum of its proper divisors (19807).

73129373 is a wasteful number, since it uses less digits than its factorization.

73129373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19806.

The product of its digits is 23814, while the sum is 35.

The square root of 73129373 is about 8551.5713760688. The cubic root of 73129373 is about 418.1806660090.

The spelling of 73129373 in words is "seventy-three million, one hundred twenty-nine thousand, three hundred seventy-three".