381554461 has 2 divisors, whose sum is σ = 381554462. Its totient is φ = 381554460.

The previous prime is 381554423. The next prime is 381554483. The reversal of 381554461 is 164455183.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 326705625 + 54848836 = 18075^2 + 7406^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381554461 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 381554461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381554401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190777230 + 190777231.

It is an arithmetic number, because the mean of its divisors is an integer number (190777231).

Almost surely, 2^381554461 is an apocalyptic number.

It is an amenable number.

381554461 is a deficient number, since it is larger than the sum of its proper divisors (1).

381554461 is an equidigital number, since it uses as much as digits as its factorization.

381554461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 57600, while the sum is 37.

The square root of 381554461 is about 19533.4190811542. The cubic root of 381554461 is about 725.3019501668.

The spelling of 381554461 in words is "three hundred eighty-one million, five hundred fifty-four thousand, four hundred sixty-one".