381517673 has 2 divisors, whose sum is σ = 381517674. Its totient is φ = 381517672.

The previous prime is 381517667. The next prime is 381517681. The reversal of 381517673 is 376715183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 323712064 + 57805609 = 17992^2 + 7603^2 .

It is a cyclic number.

It is not a de Polignac number, because 381517673 - 2¹⁰ = 381516649 is a prime.

It is a super-2 number, since 2×381517673² = 291111469622669858, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 381517673.

It is not a weakly prime, because it can be changed into another prime (381517573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190758836 + 190758837.

It is an arithmetic number, because the mean of its divisors is an integer number (190758837).

Almost surely, 2^381517673 is an apocalyptic number.

It is an amenable number.

381517673 is a deficient number, since it is larger than the sum of its proper divisors (1).

381517673 is an equidigital number, since it uses as much as digits as its factorization.

381517673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 41.

The square root of 381517673 is about 19532.4773902339. The cubic root of 381517673 is about 725.2786391514.

The spelling of 381517673 in words is "three hundred eighty-one million, five hundred seventeen thousand, six hundred seventy-three".