73203640693 has 2 divisors, whose sum is σ = 73203640694. Its totient is φ = 73203640692.

The previous prime is 73203640669. The next prime is 73203640711. The reversal of 73203640693 is 39604630237.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70334752849 + 2868887844 = 265207^2 + 53562^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73203640693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73203640193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36601820346 + 36601820347.

It is an arithmetic number, because the mean of its divisors is an integer number (36601820347).

Almost surely, 2^73203640693 is an apocalyptic number.

It is an amenable number.

73203640693 is a deficient number, since it is larger than the sum of its proper divisors (1).

73203640693 is an equidigital number, since it uses as much as digits as its factorization.

73203640693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 43.

The spelling of 73203640693 in words is "seventy-three billion, two hundred three million, six hundred forty thousand, six hundred ninety-three".