381298777 has 2 divisors, whose sum is σ = 381298778. Its totient is φ = 381298776.

The previous prime is 381298717. The next prime is 381298789. The reversal of 381298777 is 777892183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 268599321 + 112699456 = 16389^2 + 10616^2 .

It is a cyclic number.

It is not a de Polignac number, because 381298777 - 2¹⁹ = 380774489 is a prime.

It is not a weakly prime, because it can be changed into another prime (381298717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190649388 + 190649389.

It is an arithmetic number, because the mean of its divisors is an integer number (190649389).

Almost surely, 2^381298777 is an apocalyptic number.

It is an amenable number.

381298777 is a deficient number, since it is larger than the sum of its proper divisors (1).

381298777 is an equidigital number, since it uses as much as digits as its factorization.

381298777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1185408, while the sum is 52.

The square root of 381298777 is about 19526.8732007969. The cubic root of 381298777 is about 725.1399029260.

The spelling of 381298777 in words is "three hundred eighty-one million, two hundred ninety-eight thousand, seven hundred seventy-seven".