380856191 has 2 divisors, whose sum is σ = 380856192. Its totient is φ = 380856190.

The previous prime is 380856127. The next prime is 380856221. The reversal of 380856191 is 191658083.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 380856191 - 2⁶ = 380856127 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (380850191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190428095 + 190428096.

It is an arithmetic number, because the mean of its divisors is an integer number (190428096).

Almost surely, 2^380856191 is an apocalyptic number.

380856191 is a deficient number, since it is larger than the sum of its proper divisors (1).

380856191 is an equidigital number, since it uses as much as digits as its factorization.

380856191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 380856191 is about 19515.5371691378. The cubic root of 380856191 is about 724.8592297439.

The spelling of 380856191 in words is "three hundred eighty million, eight hundred fifty-six thousand, one hundred ninety-one".