389976149 has 2 divisors, whose sum is σ = 389976150. Its totient is φ = 389976148.

The previous prime is 389976101. The next prime is 389976161. The reversal of 389976149 is 941679983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197599249 + 192376900 = 14057^2 + 13870^2 .

It is a cyclic number.

It is not a de Polignac number, because 389976149 - 2¹⁶ = 389910613 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 389976094 and 389976103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (389976199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194988074 + 194988075.

It is an arithmetic number, because the mean of its divisors is an integer number (194988075).

Almost surely, 2^389976149 is an apocalyptic number.

It is an amenable number.

389976149 is a deficient number, since it is larger than the sum of its proper divisors (1).

389976149 is an equidigital number, since it uses as much as digits as its factorization.

389976149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2939328, while the sum is 56.

The square root of 389976149 is about 19747.8137777325. The cubic root of 389976149 is about 730.5994631855.

The spelling of 389976149 in words is "three hundred eighty-nine million, nine hundred seventy-six thousand, one hundred forty-nine".