73387217 has 2 divisors, whose sum is σ = 73387218. Its totient is φ = 73387216.

The previous prime is 73387213. The next prime is 73387219. The reversal of 73387217 is 71278337.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60777616 + 12609601 = 7796^2 + 3551^2 .

It is a cyclic number.

It is not a de Polignac number, because 73387217 - 2² = 73387213 is a prime.

Together with 73387219, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (73387211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36693608 + 36693609.

It is an arithmetic number, because the mean of its divisors is an integer number (36693609).

Almost surely, 2^73387217 is an apocalyptic number.

It is an amenable number.

73387217 is a deficient number, since it is larger than the sum of its proper divisors (1).

73387217 is an equidigital number, since it uses as much as digits as its factorization.

73387217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49392, while the sum is 38.

The square root of 73387217 is about 8566.6339363836. The cubic root of 73387217 is about 418.6715717975.

The spelling of 73387217 in words is "seventy-three million, three hundred eighty-seven thousand, two hundred seventeen".