381694447 has 2 divisors, whose sum is σ = 381694448. Its totient is φ = 381694446.

The previous prime is 381694403. The next prime is 381694457. The reversal of 381694447 is 744496183.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381694447 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 381694397 and 381694406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381694457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190847223 + 190847224.

It is an arithmetic number, because the mean of its divisors is an integer number (190847224).

Almost surely, 2^381694447 is an apocalyptic number.

381694447 is a deficient number, since it is larger than the sum of its proper divisors (1).

381694447 is an equidigital number, since it uses as much as digits as its factorization.

381694447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 46.

The square root of 381694447 is about 19537.0019962122. The cubic root of 381694447 is about 725.3906397379.

The spelling of 381694447 in words is "three hundred eighty-one million, six hundred ninety-four thousand, four hundred forty-seven".