389790647 has 2 divisors, whose sum is σ = 389790648. Its totient is φ = 389790646.

The previous prime is 389790629. The next prime is 389790691. The reversal of 389790647 is 746097983.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 389790647 - 2⁸ = 389790391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389790607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194895323 + 194895324.

It is an arithmetic number, because the mean of its divisors is an integer number (194895324).

Almost surely, 2^389790647 is an apocalyptic number.

389790647 is a deficient number, since it is larger than the sum of its proper divisors (1).

389790647 is an equidigital number, since it uses as much as digits as its factorization.

389790647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2286144, while the sum is 53.

The square root of 389790647 is about 19743.1164459920. The cubic root of 389790647 is about 730.4836021201.

The spelling of 389790647 in words is "three hundred eighty-nine million, seven hundred ninety thousand, six hundred forty-seven".