381146863 has 2 divisors, whose sum is σ = 381146864. Its totient is φ = 381146862.

The previous prime is 381146839. The next prime is 381146867. The reversal of 381146863 is 368641183.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381146863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381146867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190573431 + 190573432.

It is an arithmetic number, because the mean of its divisors is an integer number (190573432).

Almost surely, 2^381146863 is an apocalyptic number.

381146863 is a deficient number, since it is larger than the sum of its proper divisors (1).

381146863 is an equidigital number, since it uses as much as digits as its factorization.

381146863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 40.

The square root of 381146863 is about 19522.9829431878. The cubic root of 381146863 is about 725.0435886595.

The spelling of 381146863 in words is "three hundred eighty-one million, one hundred forty-six thousand, eight hundred sixty-three".