381512783 has 2 divisors, whose sum is σ = 381512784. Its totient is φ = 381512782.

The previous prime is 381512779. The next prime is 381512839. The reversal of 381512783 is 387215183.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 381512783 - 2² = 381512779 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381512713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190756391 + 190756392.

It is an arithmetic number, because the mean of its divisors is an integer number (190756392).

Almost surely, 2^381512783 is an apocalyptic number.

381512783 is a deficient number, since it is larger than the sum of its proper divisors (1).

381512783 is an equidigital number, since it uses as much as digits as its factorization.

381512783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 38.

The square root of 381512783 is about 19532.3522136992. The cubic root of 381512783 is about 725.2755404503.

The spelling of 381512783 in words is "three hundred eighty-one million, five hundred twelve thousand, seven hundred eighty-three".