73397809 has 2 divisors, whose sum is σ = 73397810. Its totient is φ = 73397808.

The previous prime is 73397803. The next prime is 73397839. The reversal of 73397809 is 90879337.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64754209 + 8643600 = 8047^2 + 2940^2 .

It is a cyclic number.

It is not a de Polignac number, because 73397809 - 2¹⁷ = 73266737 is a prime.

It is not a weakly prime, because it can be changed into another prime (73397803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36698904 + 36698905.

It is an arithmetic number, because the mean of its divisors is an integer number (36698905).

Almost surely, 2^73397809 is an apocalyptic number.

It is an amenable number.

73397809 is a deficient number, since it is larger than the sum of its proper divisors (1).

73397809 is an equidigital number, since it uses as much as digits as its factorization.

73397809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 285768, while the sum is 46.

The square root of 73397809 is about 8567.2521265573. The cubic root of 73397809 is about 418.6917131615.

The spelling of 73397809 in words is "seventy-three million, three hundred ninety-seven thousand, eight hundred nine".