389537389 has 2 divisors, whose sum is σ = 389537390. Its totient is φ = 389537388.

The previous prime is 389537383. The next prime is 389537429. The reversal of 389537389 is 983735983.

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., 379665225 + 9872164 = 19485^2 + 3142^2 .

It is a cyclic number.

It is not a de Polignac number, because 389537389 - 2³ = 389537381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389537381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194768694 + 194768695.

It is an arithmetic number, because the mean of its divisors is an integer number (194768695).

Almost surely, 2^389537389 is an apocalyptic number.

It is an amenable number.

389537389 is a deficient number, since it is larger than the sum of its proper divisors (1).

389537389 is an equidigital number, since it uses as much as digits as its factorization.

389537389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4898880, while the sum is 55.

The square root of 389537389 is about 19736.7015734646. The cubic root of 389537389 is about 730.3253625636.

The spelling of 389537389 in words is "three hundred eighty-nine million, five hundred thirty-seven thousand, three hundred eighty-nine".