381977 has 2 divisors, whose sum is σ = 381978. Its totient is φ = 381976.

The previous prime is 381949. The next prime is 381989. The reversal of 381977 is 779183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 364816 + 17161 = 604^2 + 131^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381977 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (381917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190988 + 190989.

It is an arithmetic number, because the mean of its divisors is an integer number (190989).

2³⁸¹⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

381977 is a deficient number, since it is larger than the sum of its proper divisors (1).

381977 is an equidigital number, since it uses as much as digits as its factorization.

381977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10584, while the sum is 35.

The square root of 381977 is about 618.0428787714. The cubic root of 381977 is about 72.5569588064.

The spelling of 381977 in words is "three hundred eighty-one thousand, nine hundred seventy-seven".