381215963 has 2 divisors, whose sum is σ = 381215964. Its totient is φ = 381215962.

The previous prime is 381215953. The next prime is 381215993. The reversal of 381215963 is 369512183.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 381215963 - 2⁶ = 381215899 is a prime.

It is a super-2 number, since 2×381215963² = 290651220892034738, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (381215953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190607981 + 190607982.

It is an arithmetic number, because the mean of its divisors is an integer number (190607982).

Almost surely, 2^381215963 is an apocalyptic number.

381215963 is a deficient number, since it is larger than the sum of its proper divisors (1).

381215963 is an equidigital number, since it uses as much as digits as its factorization.

381215963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 38.

The square root of 381215963 is about 19524.7525720558. The cubic root of 381215963 is about 725.0874015914.

The spelling of 381215963 in words is "three hundred eighty-one million, two hundred fifteen thousand, nine hundred sixty-three".