73964809 has 2 divisors, whose sum is σ = 73964810. Its totient is φ = 73964808.

The previous prime is 73964797. The next prime is 73964833. The reversal of 73964809 is 90846937.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71571600 + 2393209 = 8460^2 + 1547^2 .

It is a cyclic number.

It is not a de Polignac number, because 73964809 - 2¹⁵ = 73932041 is a prime.

It is not a weakly prime, because it can be changed into another prime (73962809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36982404 + 36982405.

It is an arithmetic number, because the mean of its divisors is an integer number (36982405).

Almost surely, 2^73964809 is an apocalyptic number.

It is an amenable number.

73964809 is a deficient number, since it is larger than the sum of its proper divisors (1).

73964809 is an equidigital number, since it uses as much as digits as its factorization.

73964809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 73964809 is about 8600.2795884785. The cubic root of 73964809 is about 419.7670836311.

The spelling of 73964809 in words is "seventy-three million, nine hundred sixty-four thousand, eight hundred nine".