73000001 has 8 divisors (see below), whose sum is σ = 75677760. Its totient is φ = 70359408.

The previous prime is 72999991. The next prime is 73000003. The reversal of 73000001 is 10000037.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73000001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73000003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5261 + ... + 13178.

It is an arithmetic number, because the mean of its divisors is an integer number (9459720).

Almost surely, 2^73000001 is an apocalyptic number.

It is an amenable number.

73000001 is a deficient number, since it is larger than the sum of its proper divisors (2677759).

73000001 is a wasteful number, since it uses less digits than its factorization.

73000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18583.

The product of its (nonzero) digits is 21, while the sum is 11.

The square root of 73000001 is about 8544.0038038381. The cubic root of 73000001 is about 417.9339215465.

Adding to 73000001 its reverse (10000037), we get a palindrome (83000038).

The spelling of 73000001 in words is "seventy-three million, one", and thus it is an aban number and an uban number.