380562781 has 2 divisors, whose sum is σ = 380562782. Its totient is φ = 380562780.

The previous prime is 380562703. The next prime is 380562811. The reversal of 380562781 is 187265083.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 215208900 + 165353881 = 14670^2 + 12859^2 .

It is a cyclic number.

It is not a de Polignac number, because 380562781 - 2⁷ = 380562653 is a prime.

It is a super-2 number, since 2×380562781² = 289656060564907922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (380568781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190281390 + 190281391.

It is an arithmetic number, because the mean of its divisors is an integer number (190281391).

Almost surely, 2^380562781 is an apocalyptic number.

It is an amenable number.

380562781 is a deficient number, since it is larger than the sum of its proper divisors (1).

380562781 is an equidigital number, since it uses as much as digits as its factorization.

380562781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 380562781 is about 19508.0183770674. The cubic root of 380562781 is about 724.6730390931.

The spelling of 380562781 in words is "three hundred eighty million, five hundred sixty-two thousand, seven hundred eighty-one".