73197389 has 2 divisors, whose sum is σ = 73197390. Its totient is φ = 73197388.

The previous prime is 73197353. The next prime is 73197413. The reversal of 73197389 is 98379137.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39904489 + 33292900 = 6317^2 + 5770^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73197389 is a prime.

It is a Sophie Germain prime.

It is a Chen 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 (73197349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36598694 + 36598695.

It is an arithmetic number, because the mean of its divisors is an integer number (36598695).

Almost surely, 2^73197389 is an apocalyptic number.

It is an amenable number.

73197389 is a deficient number, since it is larger than the sum of its proper divisors (1).

73197389 is an equidigital number, since it uses as much as digits as its factorization.

73197389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 285768, while the sum is 47.

The square root of 73197389 is about 8555.5472647867. The cubic root of 73197389 is about 418.3102726751.

The spelling of 73197389 in words is "seventy-three million, one hundred ninety-seven thousand, three hundred eighty-nine".