389544657 has 4 divisors (see below), whose sum is σ = 519392880. Its totient is φ = 259696436.

The previous prime is 389544643. The next prime is 389544671. The reversal of 389544657 is 756445983.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (389544643) and next prime (389544671).

It is a cyclic number.

It is not a de Polignac number, because 389544657 - 2¹² = 389540561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (389544607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64924107 + ... + 64924112.

It is an arithmetic number, because the mean of its divisors is an integer number (129848220).

Almost surely, 2^389544657 is an apocalyptic number.

It is an amenable number.

389544657 is a deficient number, since it is larger than the sum of its proper divisors (129848223).

389544657 is a wasteful number, since it uses less digits than its factorization.

389544657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129848222.

The product of its digits is 3628800, while the sum is 51.

The square root of 389544657 is about 19736.8856965834. The cubic root of 389544657 is about 730.3299046793.

The spelling of 389544657 in words is "three hundred eighty-nine million, five hundred forty-four thousand, six hundred fifty-seven".