389967973 has 4 divisors (see below), whose sum is σ = 390020940. Its totient is φ = 389915008.

The previous prime is 389967953. The next prime is 389967983. The reversal of 389967973 is 379769983.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 200024449 + 189943524 = 14143^2 + 13782^2 .

It is a cyclic number.

It is not a de Polignac number, because 389967973 - 2¹⁷ = 389836901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389967953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13228 + ... + 30901.

It is an arithmetic number, because the mean of its divisors is an integer number (97505235).

Almost surely, 2^389967973 is an apocalyptic number.

It is an amenable number.

389967973 is a deficient number, since it is larger than the sum of its proper divisors (52967).

389967973 is an equidigital number, since it uses as much as digits as its factorization.

389967973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52966.

The product of its digits is 15431472, while the sum is 61.

The square root of 389967973 is about 19747.6067663907. The cubic root of 389967973 is about 730.5943573836.

The spelling of 389967973 in words is "three hundred eighty-nine million, nine hundred sixty-seven thousand, nine hundred seventy-three".