73071289 has 2 divisors, whose sum is σ = 73071290. Its totient is φ = 73071288.

The previous prime is 73071227. The next prime is 73071293. The reversal of 73071289 is 98217037.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58782889 + 14288400 = 7667^2 + 3780^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73071289 is a prime.

It is a super-2 number, since 2×73071289² = 10678826552243042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (73071589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36535644 + 36535645.

It is an arithmetic number, because the mean of its divisors is an integer number (36535645).

Almost surely, 2^73071289 is an apocalyptic number.

It is an amenable number.

73071289 is a deficient number, since it is larger than the sum of its proper divisors (1).

73071289 is an equidigital number, since it uses as much as digits as its factorization.

73071289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 73071289 is about 8548.1746004630. The cubic root of 73071289 is about 418.0699214549.

The spelling of 73071289 in words is "seventy-three million, seventy-one thousand, two hundred eighty-nine".