73171640797 has 2 divisors, whose sum is σ = 73171640798. Its totient is φ = 73171640796.

The previous prime is 73171640749. The next prime is 73171640809. The reversal of 73171640797 is 79704617137.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43468497081 + 29703143716 = 208491^2 + 172346^2 .

It is an emirp because it is prime and its reverse (79704617137) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73171640797 - 2¹⁹ = 73171116509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73171640897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36585820398 + 36585820399.

It is an arithmetic number, because the mean of its divisors is an integer number (36585820399).

Almost surely, 2^73171640797 is an apocalyptic number.

It is an amenable number.

73171640797 is a deficient number, since it is larger than the sum of its proper divisors (1).

73171640797 is an equidigital number, since it uses as much as digits as its factorization.

73171640797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1555848, while the sum is 52.

The spelling of 73171640797 in words is "seventy-three billion, one hundred seventy-one million, six hundred forty thousand, seven hundred ninety-seven".