386066809 has 2 divisors, whose sum is σ = 386066810. Its totient is φ = 386066808.

The previous prime is 386066717. The next prime is 386066861. The reversal of 386066809 is 908660683.

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., 363741184 + 22325625 = 19072^2 + 4725^2 .

It is a cyclic number.

It is not a de Polignac number, because 386066809 - 2¹¹ = 386064761 is a prime.

It is a super-2 number, since 2×386066809² = 298095162022884962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (386066869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193033404 + 193033405.

It is an arithmetic number, because the mean of its divisors is an integer number (193033405).

Almost surely, 2^386066809 is an apocalyptic number.

It is an amenable number.

386066809 is a deficient number, since it is larger than the sum of its proper divisors (1).

386066809 is an equidigital number, since it uses as much as digits as its factorization.

386066809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 386066809 is about 19648.5828751083. The cubic root of 386066809 is about 728.1499465969.

The spelling of 386066809 in words is "three hundred eighty-six million, sixty-six thousand, eight hundred nine".