386971217 has 2 divisors, whose sum is σ = 386971218. Its totient is φ = 386971216.

The previous prime is 386971183. The next prime is 386971241. The reversal of 386971217 is 712179683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 364084561 + 22886656 = 19081^2 + 4784^2 .

It is a cyclic number.

It is not a de Polignac number, because 386971217 - 2²⁸ = 118535761 is a prime.

It is a super-2 number, since 2×386971217² = 299493445572922178, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (386979217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193485608 + 193485609.

It is an arithmetic number, because the mean of its divisors is an integer number (193485609).

Almost surely, 2^386971217 is an apocalyptic number.

It is an amenable number.

386971217 is a deficient number, since it is larger than the sum of its proper divisors (1).

386971217 is an equidigital number, since it uses as much as digits as its factorization.

386971217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 44.

The square root of 386971217 is about 19671.5839982448. The cubic root of 386971217 is about 728.7180961587.

The spelling of 386971217 in words is "three hundred eighty-six million, nine hundred seventy-one thousand, two hundred seventeen".