73645001 has 4 divisors (see below), whose sum is σ = 73673604. Its totient is φ = 73616400.

The previous prime is 73644983. The next prime is 73645027. The reversal of 73645001 is 10054637.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10054637 = 151 ⋅66587.

It can be written as a sum of positive squares in 2 ways, for example, as 46854025 + 26790976 = 6845^2 + 5176^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73645001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73645031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10010 + ... + 15731.

It is an arithmetic number, because the mean of its divisors is an integer number (18418401).

It is a Poulet number, since it divides 2^73645000-1.

Almost surely, 2^73645001 is an apocalyptic number.

It is an amenable number.

73645001 is a deficient number, since it is larger than the sum of its proper divisors (28603).

73645001 is a wasteful number, since it uses less digits than its factorization.

73645001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28602.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 73645001 is about 8581.6665630867. Note that the first 3 decimals coincide. The cubic root of 73645001 is about 419.1612152394.

Adding to 73645001 its reverse (10054637), we get a palindrome (83699638).

The spelling of 73645001 in words is "seventy-three million, six hundred forty-five thousand, one".