389049421 has 2 divisors, whose sum is σ = 389049422. Its totient is φ = 389049420.

The previous prime is 389049391. The next prime is 389049499. The reversal of 389049421 is 124940983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 257121225 + 131928196 = 16035^2 + 11486^2 .

It is a cyclic number.

It is not a de Polignac number, because 389049421 - 2⁷ = 389049293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389049121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194524710 + 194524711.

It is an arithmetic number, because the mean of its divisors is an integer number (194524711).

Almost surely, 2^389049421 is an apocalyptic number.

It is an amenable number.

389049421 is a deficient number, since it is larger than the sum of its proper divisors (1).

389049421 is an equidigital number, since it uses as much as digits as its factorization.

389049421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 389049421 is about 19724.3357556091. The cubic root of 389049421 is about 730.0202790388.

The spelling of 389049421 in words is "three hundred eighty-nine million, forty-nine thousand, four hundred twenty-one".