73073047309 has 2 divisors, whose sum is σ = 73073047310. Its totient is φ = 73073047308.

The previous prime is 73073047301. The next prime is 73073047319. The reversal of 73073047309 is 90374037037.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51837271684 + 21235775625 = 227678^2 + 145725^2 .

It is a cyclic number.

It is not a de Polignac number, because 73073047309 - 2³ = 73073047301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73073047301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36536523654 + 36536523655.

It is an arithmetic number, because the mean of its divisors is an integer number (36536523655).

Almost surely, 2^73073047309 is an apocalyptic number.

It is an amenable number.

73073047309 is a deficient number, since it is larger than the sum of its proper divisors (1).

73073047309 is an equidigital number, since it uses as much as digits as its factorization.

73073047309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 333396, while the sum is 43.

The spelling of 73073047309 in words is "seventy-three billion, seventy-three million, forty-seven thousand, three hundred nine".