386921 has 2 divisors, whose sum is σ = 386922. Its totient is φ = 386920.

The previous prime is 386891. The next prime is 386927. The reversal of 386921 is 129683.

386921 is nontrivially palindromic in base 7.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 346921 + 40000 = 589^2 + 200^2 .

It is a cyclic number.

It is not a de Polignac number, because 386921 - 2¹⁰ = 385897 is a prime.

It is a Chen prime.

It is a plaindrome in base 11 and base 15.

It is not a weakly prime, because it can be changed into another prime (386927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193460 + 193461.

It is an arithmetic number, because the mean of its divisors is an integer number (193461).

2³⁸⁶⁹²¹ is an apocalyptic number.

It is an amenable number.

386921 is a deficient number, since it is larger than the sum of its proper divisors (1).

386921 is an equidigital number, since it uses as much as digits as its factorization.

386921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 29.

The square root of 386921 is about 622.0297420542. The cubic root of 386921 is about 72.8686573039.

The spelling of 386921 in words is "three hundred eighty-six thousand, nine hundred twenty-one".