381132739 has 4 divisors (see below), whose sum is σ = 410450656. Its totient is φ = 351814824.

The previous prime is 381132683. The next prime is 381132749. The reversal of 381132739 is 937231183.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 381132739 - 2⁷ = 381132611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 381132698 and 381132707.

It is not an unprimeable number, because it can be changed into a prime (381132749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14658939 + ... + 14658964.

It is an arithmetic number, because the mean of its divisors is an integer number (102612664).

Almost surely, 2^381132739 is an apocalyptic number.

381132739 is a deficient number, since it is larger than the sum of its proper divisors (29317917).

381132739 is a wasteful number, since it uses less digits than its factorization.

381132739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29317916.

The product of its digits is 27216, while the sum is 37.

The square root of 381132739 is about 19522.6212123270. The cubic root of 381132739 is about 725.0346326698.

The spelling of 381132739 in words is "three hundred eighty-one million, one hundred thirty-two thousand, seven hundred thirty-nine".