73673500009 has 2 divisors, whose sum is σ = 73673500010. Its totient is φ = 73673500008.

The previous prime is 73673499979. The next prime is 73673500037. The reversal of 73673500009 is 90000537637.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71007326784 + 2666173225 = 266472^2 + 51635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73673500009 is a prime.

It is a super-2 number, since 2×73673500009² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (73673500309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36836750004 + 36836750005.

It is an arithmetic number, because the mean of its divisors is an integer number (36836750005).

Almost surely, 2^73673500009 is an apocalyptic number.

It is an amenable number.

73673500009 is a deficient number, since it is larger than the sum of its proper divisors (1).

73673500009 is an equidigital number, since it uses as much as digits as its factorization.

73673500009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 119070, while the sum is 40.

The spelling of 73673500009 in words is "seventy-three billion, six hundred seventy-three million, five hundred thousand, nine".