386817449 has 2 divisors, whose sum is σ = 386817450. Its totient is φ = 386817448.

The previous prime is 386817413. The next prime is 386817451. The reversal of 386817449 is 944718683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 385729600 + 1087849 = 19640^2 + 1043^2 .

It is a cyclic number.

It is not a de Polignac number, because 386817449 - 2¹² = 386813353 is a prime.

Together with 386817451, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 386817397 and 386817406.

It is not a weakly prime, because it can be changed into another prime (386837449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193408724 + 193408725.

It is an arithmetic number, because the mean of its divisors is an integer number (193408725).

Almost surely, 2^386817449 is an apocalyptic number.

It is an amenable number.

386817449 is a deficient number, since it is larger than the sum of its proper divisors (1).

386817449 is an equidigital number, since it uses as much as digits as its factorization.

386817449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 50.

The square root of 386817449 is about 19667.6752312011. The cubic root of 386817449 is about 728.6215615289.

The spelling of 386817449 in words is "three hundred eighty-six million, eight hundred seventeen thousand, four hundred forty-nine".