381674819 has 2 divisors, whose sum is σ = 381674820. Its totient is φ = 381674818.

The previous prime is 381674807. The next prime is 381674851. The reversal of 381674819 is 918476183.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381674819 is a prime.

It is a super-2 number, since 2×381674819² = 291351334917365522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (381674899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190837409 + 190837410.

It is an arithmetic number, because the mean of its divisors is an integer number (190837410).

Almost surely, 2^381674819 is an apocalyptic number.

381674819 is a deficient number, since it is larger than the sum of its proper divisors (1).

381674819 is an equidigital number, since it uses as much as digits as its factorization.

381674819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 47.

The square root of 381674819 is about 19536.4996608911. The cubic root of 381674819 is about 725.3782055237.

The spelling of 381674819 in words is "three hundred eighty-one million, six hundred seventy-four thousand, eight hundred nineteen".