73366409 has 2 divisors, whose sum is σ = 73366410. Its totient is φ = 73366408.

The previous prime is 73366399. The next prime is 73366411. The reversal of 73366409 is 90466337.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72505225 + 861184 = 8515^2 + 928^2 .

It is a cyclic number.

It is not a de Polignac number, because 73366409 - 2⁴ = 73366393 is a prime.

Together with 73366411, 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 (73366459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36683204 + 36683205.

It is an arithmetic number, because the mean of its divisors is an integer number (36683205).

Almost surely, 2^73366409 is an apocalyptic number.

It is an amenable number.

73366409 is a deficient number, since it is larger than the sum of its proper divisors (1).

73366409 is an equidigital number, since it uses as much as digits as its factorization.

73366409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 38.

The square root of 73366409 is about 8565.4193709357. The cubic root of 73366409 is about 418.6319984135.

The spelling of 73366409 in words is "seventy-three million, three hundred sixty-six thousand, four hundred nine".