73712545 has 4 divisors (see below), whose sum is σ = 88455060. Its totient is φ = 58970032.

The previous prime is 73712543. The next prime is 73712557. The reversal of 73712545 is 54521737.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54521737 = 17 ⋅3207161.

It can be written as a sum of positive squares in 2 ways, for example, as 47210641 + 26501904 = 6871^2 + 5148^2 .

It is a cyclic number.

It is not a de Polignac number, because 73712545 - 2¹ = 73712543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 73712545.

It is not an unprimeable number, because it can be changed into a prime (73712543) 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 3 ways as a sum of consecutive naturals, for example, 7371250 + ... + 7371259.

It is an arithmetic number, because the mean of its divisors is an integer number (22113765).

Almost surely, 2^73712545 is an apocalyptic number.

It is an amenable number.

73712545 is a deficient number, since it is larger than the sum of its proper divisors (14742515).

73712545 is a wasteful number, since it uses less digits than its factorization.

73712545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14742514.

The product of its digits is 29400, while the sum is 34.

The square root of 73712545 is about 8585.6010273015. The cubic root of 73712545 is about 419.2893215770.

The spelling of 73712545 in words is "seventy-three million, seven hundred twelve thousand, five hundred forty-five".