381394297 has 2 divisors, whose sum is σ = 381394298. Its totient is φ = 381394296.

The previous prime is 381394241. The next prime is 381394301. The reversal of 381394297 is 792493183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 229340736 + 152053561 = 15144^2 + 12331^2 .

It is a cyclic number.

It is not a de Polignac number, because 381394297 - 2²⁷ = 247176569 is a prime.

It is not a weakly prime, because it can be changed into another prime (381094297) 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, 190697148 + 190697149.

It is an arithmetic number, because the mean of its divisors is an integer number (190697149).

Almost surely, 2^381394297 is an apocalyptic number.

It is an amenable number.

381394297 is a deficient number, since it is larger than the sum of its proper divisors (1).

381394297 is an equidigital number, since it uses as much as digits as its factorization.

381394297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 46.

The square root of 381394297 is about 19529.3189077346. The cubic root of 381394297 is about 725.2004500040.

It can be divided in two parts, 38139 and 4297, that added together give a square (42436 = 206²).

The spelling of 381394297 in words is "three hundred eighty-one million, three hundred ninety-four thousand, two hundred ninety-seven".