380997779 has 2 divisors, whose sum is σ = 380997780. Its totient is φ = 380997778.

The previous prime is 380997739. The next prime is 380997797. The reversal of 380997779 is 977799083.

Together with next prime (380997797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (977799083) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 380997779 - 2²⁸ = 112562323 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (380997739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190498889 + 190498890.

It is an arithmetic number, because the mean of its divisors is an integer number (190498890).

Almost surely, 2^380997779 is an apocalyptic number.

380997779 is a deficient number, since it is larger than the sum of its proper divisors (1).

380997779 is an equidigital number, since it uses as much as digits as its factorization.

380997779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6001128, while the sum is 59.

The square root of 380997779 is about 19519.1644032218. The cubic root of 380997779 is about 724.9490437433.

The spelling of 380997779 in words is "three hundred eighty million, nine hundred ninety-seven thousand, seven hundred seventy-nine".