73445345 has 4 divisors (see below), whose sum is σ = 88134420. Its totient is φ = 58756272.

The previous prime is 73445341. The next prime is 73445363. The reversal of 73445345 is 54354437.

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 33918976 + 39526369 = 5824^2 + 6287^2 .

It is a cyclic number.

It is not a de Polignac number, because 73445345 - 2² = 73445341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (73445341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7344530 + ... + 7344539.

It is an arithmetic number, because the mean of its divisors is an integer number (22033605).

Almost surely, 2^73445345 is an apocalyptic number.

It is an amenable number.

73445345 is a deficient number, since it is larger than the sum of its proper divisors (14689075).

73445345 is a wasteful number, since it uses less digits than its factorization.

73445345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14689074.

The product of its digits is 100800, while the sum is 35.

The square root of 73445345 is about 8570.0259626211. The cubic root of 73445345 is about 418.7820820449.

The spelling of 73445345 in words is "seventy-three million, four hundred forty-five thousand, three hundred forty-five".