381934873 has 2 divisors, whose sum is σ = 381934874. Its totient is φ = 381934872.

The previous prime is 381934859. The next prime is 381934897. The reversal of 381934873 is 378439183.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 311593104 + 70341769 = 17652^2 + 8387^2 .

It is a cyclic number.

It is not a de Polignac number, because 381934873 - 2¹³ = 381926681 is a prime.

It is a super-2 number, since 2×381934873² = 291748494427052258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (381937873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190967436 + 190967437.

It is an arithmetic number, because the mean of its divisors is an integer number (190967437).

Almost surely, 2^381934873 is an apocalyptic number.

It is an amenable number.

381934873 is a deficient number, since it is larger than the sum of its proper divisors (1).

381934873 is an equidigital number, since it uses as much as digits as its factorization.

381934873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 46.

The square root of 381934873 is about 19543.1541210727. The cubic root of 381934873 is about 725.5429135142.

The spelling of 381934873 in words is "three hundred eighty-one million, nine hundred thirty-four thousand, eight hundred seventy-three".