381363473 has 2 divisors, whose sum is σ = 381363474. Its totient is φ = 381363472.

The previous prime is 381363469. The next prime is 381363491. The reversal of 381363473 is 374363183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 233692369 + 147671104 = 15287^2 + 12152^2 .

It is an emirp because it is prime and its reverse (374363183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 381363473 - 2² = 381363469 is a prime.

It is not a weakly prime, because it can be changed into another prime (381363373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190681736 + 190681737.

It is an arithmetic number, because the mean of its divisors is an integer number (190681737).

Almost surely, 2^381363473 is an apocalyptic number.

It is an amenable number.

381363473 is a deficient number, since it is larger than the sum of its proper divisors (1).

381363473 is an equidigital number, since it uses as much as digits as its factorization.

381363473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 38.

The square root of 381363473 is about 19528.5297193619. The cubic root of 381363473 is about 725.1809127595.

The spelling of 381363473 in words is "three hundred eighty-one million, three hundred sixty-three thousand, four hundred seventy-three".