381945659 has 12 divisors (see below), whose sum is σ = 401523408. Its totient is φ = 362633040.

The previous prime is 381945653. The next prime is 381945667. The reversal of 381945659 is 956549183.

It is a happy number.

It is not a de Polignac number, because 381945659 - 2¹² = 381941563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381945653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1023797 + ... + 1024169.

It is an arithmetic number, because the mean of its divisors is an integer number (33460284).

Almost surely, 2^381945659 is an apocalyptic number.

381945659 is a deficient number, since it is larger than the sum of its proper divisors (19577749).

381945659 is an equidigital number, since it uses as much as digits as its factorization.

381945659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818 (or 607 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 50.

The square root of 381945659 is about 19543.4300725333. The cubic root of 381945659 is about 725.5497433280.

The spelling of 381945659 in words is "three hundred eighty-one million, nine hundred forty-five thousand, six hundred fifty-nine".