73081313 has 2 divisors, whose sum is σ = 73081314. Its totient is φ = 73081312.

The previous prime is 73081303. The next prime is 73081319. The reversal of 73081313 is 31318037.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64272289 + 8809024 = 8017^2 + 2968^2 .

It is an emirp because it is prime and its reverse (31318037) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73081313 - 2¹² = 73077217 is a prime.

It is not a weakly prime, because it can be changed into another prime (73081319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36540656 + 36540657.

It is an arithmetic number, because the mean of its divisors is an integer number (36540657).

Almost surely, 2^73081313 is an apocalyptic number.

It is an amenable number.

73081313 is a deficient number, since it is larger than the sum of its proper divisors (1).

73081313 is an equidigital number, since it uses as much as digits as its factorization.

73081313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 73081313 is about 8548.7609043650. The cubic root of 73081313 is about 418.0890376784.

The spelling of 73081313 in words is "seventy-three million, eighty-one thousand, three hundred thirteen".