380831777 has 2 divisors, whose sum is σ = 380831778. Its totient is φ = 380831776.

The previous prime is 380831753. The next prime is 380831827. The reversal of 380831777 is 777138083.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 374461201 + 6370576 = 19351^2 + 2524^2 .

It is a cyclic number.

It is not a de Polignac number, because 380831777 - 2²⁸ = 112396321 is a prime.

It is not a weakly prime, because it can be changed into another prime (380831377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190415888 + 190415889.

It is an arithmetic number, because the mean of its divisors is an integer number (190415889).

Almost surely, 2^380831777 is an apocalyptic number.

It is an amenable number.

380831777 is a deficient number, since it is larger than the sum of its proper divisors (1).

380831777 is an equidigital number, since it uses as much as digits as its factorization.

380831777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 197568, while the sum is 44.

The square root of 380831777 is about 19514.9116574992. The cubic root of 380831777 is about 724.8437408780.

The spelling of 380831777 in words is "three hundred eighty million, eight hundred thirty-one thousand, seven hundred seventy-seven".