389708947 has 4 divisors (see below), whose sum is σ = 397062000. Its totient is φ = 382355896.

The previous prime is 389708911. The next prime is 389708953. The reversal of 389708947 is 749807983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 749807983 = 2267 ⋅330749.

It is a cyclic number.

It is not a de Polignac number, because 389708947 - 2¹⁹ = 389184659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389708147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3676447 + ... + 3676552.

It is an arithmetic number, because the mean of its divisors is an integer number (99265500).

Almost surely, 2^389708947 is an apocalyptic number.

389708947 is a deficient number, since it is larger than the sum of its proper divisors (7353053).

389708947 is an equidigital number, since it uses as much as digits as its factorization.

389708947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7353052.

The product of its (nonzero) digits is 3048192, while the sum is 55.

The square root of 389708947 is about 19741.0472619869. The cubic root of 389708947 is about 730.4325621743.

The spelling of 389708947 in words is "three hundred eighty-nine million, seven hundred eight thousand, nine hundred forty-seven".