73147665389 has 2 divisors, whose sum is σ = 73147665390. Its totient is φ = 73147665388.

The previous prime is 73147665313. The next prime is 73147665473. The reversal of 73147665389 is 98356674137.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50303761225 + 22843904164 = 224285^2 + 151142^2 .

It is a cyclic number.

It is not a de Polignac number, because 73147665389 - 2⁸ = 73147665133 is a prime.

It is a super-2 number, since 2×73147665389² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73147665089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36573832694 + 36573832695.

It is an arithmetic number, because the mean of its divisors is an integer number (36573832695).

Almost surely, 2^73147665389 is an apocalyptic number.

It is an amenable number.

73147665389 is a deficient number, since it is larger than the sum of its proper divisors (1).

73147665389 is an equidigital number, since it uses as much as digits as its factorization.

73147665389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22861440, while the sum is 59.

The spelling of 73147665389 in words is "seventy-three billion, one hundred forty-seven million, six hundred sixty-five thousand, three hundred eighty-nine".