389646437 has 2 divisors, whose sum is σ = 389646438. Its totient is φ = 389646436.

The previous prime is 389646431. The next prime is 389646449. The reversal of 389646437 is 734646983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 222875041 + 166771396 = 14929^2 + 12914^2 .

It is a cyclic number.

It is not a de Polignac number, because 389646437 - 2⁴ = 389646421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389646431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194823218 + 194823219.

It is an arithmetic number, because the mean of its divisors is an integer number (194823219).

Almost surely, 2^389646437 is an apocalyptic number.

It is an amenable number.

389646437 is a deficient number, since it is larger than the sum of its proper divisors (1).

389646437 is an equidigital number, since it uses as much as digits as its factorization.

389646437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 50.

The square root of 389646437 is about 19739.4639491553. The cubic root of 389646437 is about 730.3935058638.

The spelling of 389646437 in words is "three hundred eighty-nine million, six hundred forty-six thousand, four hundred thirty-seven".