389954881 has 2 divisors, whose sum is σ = 389954882. Its totient is φ = 389954880.

The previous prime is 389954869. The next prime is 389954893. The reversal of 389954881 is 188459983.

It is a balanced prime because it is at equal distance from previous prime (389954869) and next prime (389954893).

It can be written as a sum of positive squares in only one way, i.e., 242113600 + 147841281 = 15560^2 + 12159^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-389954881 is a prime.

It is a super-2 number, since 2×389954881² = 304129618431448322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (389954821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194977440 + 194977441.

It is an arithmetic number, because the mean of its divisors is an integer number (194977441).

Almost surely, 2^389954881 is an apocalyptic number.

It is an amenable number.

389954881 is a deficient number, since it is larger than the sum of its proper divisors (1).

389954881 is an equidigital number, since it uses as much as digits as its factorization.

389954881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2488320, while the sum is 55.

The square root of 389954881 is about 19747.2752804026. The cubic root of 389954881 is about 730.5861814571.

The spelling of 389954881 in words is "three hundred eighty-nine million, nine hundred fifty-four thousand, eight hundred eighty-one".