387161189 has 2 divisors, whose sum is σ = 387161190. Its totient is φ = 387161188.

The previous prime is 387161183. The next prime is 387161191. The reversal of 387161189 is 981161783.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 332770564 + 54390625 = 18242^2 + 7375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-387161189 is a prime.

Together with 387161191, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (387161183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193580594 + 193580595.

It is an arithmetic number, because the mean of its divisors is an integer number (193580595).

Almost surely, 2^387161189 is an apocalyptic number.

It is an amenable number.

387161189 is a deficient number, since it is larger than the sum of its proper divisors (1).

387161189 is an equidigital number, since it uses as much as digits as its factorization.

387161189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 44.

The square root of 387161189 is about 19676.4119950767. The cubic root of 387161189 is about 728.8373241362.

The spelling of 387161189 in words is "three hundred eighty-seven million, one hundred sixty-one thousand, one hundred eighty-nine".