918370397573 has 2 divisors, whose sum is σ = 918370397574. Its totient is φ = 918370397572.

The previous prime is 918370397569. The next prime is 918370397591. The reversal of 918370397573 is 375793073819.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 887933059204 + 30437338369 = 942302^2 + 174463^2 .

It is a cyclic number.

It is not a de Polignac number, because 918370397573 - 2² = 918370397569 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (918370397563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459185198786 + 459185198787.

It is an arithmetic number, because the mean of its divisors is an integer number (459185198787).

Almost surely, 2^918370397573 is an apocalyptic number.

It is an amenable number.

918370397573 is a deficient number, since it is larger than the sum of its proper divisors (1).

918370397573 is an equidigital number, since it uses as much as digits as its factorization.

918370397573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30005640, while the sum is 62.

The spelling of 918370397573 in words is "nine hundred eighteen billion, three hundred seventy million, three hundred ninety-seven thousand, five hundred seventy-three".