389154217 has 2 divisors, whose sum is σ = 389154218. Its totient is φ = 389154216.

The previous prime is 389154193. The next prime is 389154223. The reversal of 389154217 is 712451983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 254849296 + 134304921 = 15964^2 + 11589^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-389154217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 389154217.

It is not a weakly prime, because it can be changed into another prime (389154317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194577108 + 194577109.

It is an arithmetic number, because the mean of its divisors is an integer number (194577109).

Almost surely, 2^389154217 is an apocalyptic number.

It is an amenable number.

389154217 is a deficient number, since it is larger than the sum of its proper divisors (1).

389154217 is an equidigital number, since it uses as much as digits as its factorization.

389154217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 40.

The square root of 389154217 is about 19726.9920920550. The cubic root of 389154217 is about 730.0858202726.

The spelling of 389154217 in words is "three hundred eighty-nine million, one hundred fifty-four thousand, two hundred seventeen".