73409573 has 2 divisors, whose sum is σ = 73409574. Its totient is φ = 73409572.

The previous prime is 73409569. The next prime is 73409617. The reversal of 73409573 is 37590437.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64754209 + 8655364 = 8047^2 + 2942^2 .

It is a cyclic number.

It is not a de Polignac number, because 73409573 - 2² = 73409569 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73409543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36704786 + 36704787.

It is an arithmetic number, because the mean of its divisors is an integer number (36704787).

Almost surely, 2^73409573 is an apocalyptic number.

It is an amenable number.

73409573 is a deficient number, since it is larger than the sum of its proper divisors (1).

73409573 is an equidigital number, since it uses as much as digits as its factorization.

73409573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 79380, while the sum is 38.

The square root of 73409573 is about 8567.9386669140. The cubic root of 73409573 is about 418.7140808873.

The spelling of 73409573 in words is "seventy-three million, four hundred nine thousand, five hundred seventy-three".