386979121 has 2 divisors, whose sum is σ = 386979122. Its totient is φ = 386979120.

The previous prime is 386979119. The next prime is 386979127. The reversal of 386979121 is 121979683.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 381030400 + 5948721 = 19520^2 + 2439^2 .

It is a cyclic number.

It is not a de Polignac number, because 386979121 - 2¹ = 386979119 is a prime.

Together with 386979119, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (386979127) 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, 193489560 + 193489561.

It is an arithmetic number, because the mean of its divisors is an integer number (193489561).

Almost surely, 2^386979121 is an apocalyptic number.

It is an amenable number.

386979121 is a deficient number, since it is larger than the sum of its proper divisors (1).

386979121 is an equidigital number, since it uses as much as digits as its factorization.

386979121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 46.

The square root of 386979121 is about 19671.7848961400. The cubic root of 386979121 is about 728.7230575515.

The spelling of 386979121 in words is "three hundred eighty-six million, nine hundred seventy-nine thousand, one hundred twenty-one".