389427121 has 2 divisors, whose sum is σ = 389427122. Its totient is φ = 389427120.

The previous prime is 389427089. The next prime is 389427149. The reversal of 389427121 is 121724983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 231648400 + 157778721 = 15220^2 + 12561^2 .

It is an emirp because it is prime and its reverse (121724983) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 389427121 - 2⁵ = 389427089 is a prime.

It is not a weakly prime, because it can be changed into another prime (389427151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194713560 + 194713561.

It is an arithmetic number, because the mean of its divisors is an integer number (194713561).

Almost surely, 2^389427121 is an apocalyptic number.

It is an amenable number.

389427121 is a deficient number, since it is larger than the sum of its proper divisors (1).

389427121 is an equidigital number, since it uses as much as digits as its factorization.

389427121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 37.

The square root of 389427121 is about 19733.9078998560. The cubic root of 389427121 is about 730.2564439614.

The spelling of 389427121 in words is "three hundred eighty-nine million, four hundred twenty-seven thousand, one hundred twenty-one".