73147573 has 2 divisors, whose sum is σ = 73147574. Its totient is φ = 73147572.

The previous prime is 73147559. The next prime is 73147609. The reversal of 73147573 is 37574137.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69605649 + 3541924 = 8343^2 + 1882^2 .

It is an emirp because it is prime and its reverse (37574137) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73147573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73147523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36573786 + 36573787.

It is an arithmetic number, because the mean of its divisors is an integer number (36573787).

Almost surely, 2^73147573 is an apocalyptic number.

It is an amenable number.

73147573 is a deficient number, since it is larger than the sum of its proper divisors (1).

73147573 is an equidigital number, since it uses as much as digits as its factorization.

73147573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61740, while the sum is 37.

The square root of 73147573 is about 8552.6354417805. The cubic root of 73147573 is about 418.2153545640.

The spelling of 73147573 in words is "seventy-three million, one hundred forty-seven thousand, five hundred seventy-three".