73100081 has 2 divisors, whose sum is σ = 73100082. Its totient is φ = 73100080.

The previous prime is 73100047. The next prime is 73100107. The reversal of 73100081 is 18000137.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71250481 + 1849600 = 8441^2 + 1360^2 .

It is an emirp because it is prime and its reverse (18000137) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73100081 - 2²⁶ = 5991217 is a prime.

It is a super-2 number, since 2×73100081² = 10687243684413122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (73100381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36550040 + 36550041.

It is an arithmetic number, because the mean of its divisors is an integer number (36550041).

Almost surely, 2^73100081 is an apocalyptic number.

It is an amenable number.

73100081 is a deficient number, since it is larger than the sum of its proper divisors (1).

73100081 is an equidigital number, since it uses as much as digits as its factorization.

73100081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 73100081 is about 8549.8585368414. The cubic root of 73100081 is about 418.1248244075.

The spelling of 73100081 in words is "seventy-three million, one hundred thousand, eighty-one".