381853019 has 2 divisors, whose sum is σ = 381853020. Its totient is φ = 381853018.

The previous prime is 381853001. The next prime is 381853081. The reversal of 381853019 is 910358183.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381853019 is a prime.

It is a super-2 number, since 2×381853019² = 291623456238828722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (381853919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190926509 + 190926510.

It is an arithmetic number, because the mean of its divisors is an integer number (190926510).

Almost surely, 2^381853019 is an apocalyptic number.

381853019 is a deficient number, since it is larger than the sum of its proper divisors (1).

381853019 is an equidigital number, since it uses as much as digits as its factorization.

381853019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 381853019 is about 19541.0598228448. The cubic root of 381853019 is about 725.4910784703.

The spelling of 381853019 in words is "three hundred eighty-one million, eight hundred fifty-three thousand, nineteen".