73390409 has 2 divisors, whose sum is σ = 73390410. Its totient is φ = 73390408.

The previous prime is 73390403. The next prime is 73390507. The reversal of 73390409 is 90409337.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50013184 + 23377225 = 7072^2 + 4835^2 .

It is an emirp because it is prime and its reverse (90409337) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73390409 - 2¹⁶ = 73324873 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (73390403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36695204 + 36695205.

It is an arithmetic number, because the mean of its divisors is an integer number (36695205).

Almost surely, 2^73390409 is an apocalyptic number.

It is an amenable number.

73390409 is a deficient number, since it is larger than the sum of its proper divisors (1).

73390409 is an equidigital number, since it uses as much as digits as its factorization.

73390409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 73390409 is about 8566.8202385716. The cubic root of 73390409 is about 418.6776417932.

The spelling of 73390409 in words is "seventy-three million, three hundred ninety thousand, four hundred nine".