381399783 has 8 divisors (see below), whose sum is σ = 519353088. Its totient is φ = 248856504.

The previous prime is 381399773. The next prime is 381399791. The reversal of 381399783 is 387993183.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 381399783 - 2⁵ = 381399751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381399763) 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 7 ways as a sum of consecutive naturals, for example, 1352341 + ... + 1352622.

It is an arithmetic number, because the mean of its divisors is an integer number (64919136).

Almost surely, 2^381399783 is an apocalyptic number.

381399783 is a deficient number, since it is larger than the sum of its proper divisors (137953305).

381399783 is a wasteful number, since it uses less digits than its factorization.

381399783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2705013.

The product of its digits is 979776, while the sum is 51.

The square root of 381399783 is about 19529.4593627166. The cubic root of 381399783 is about 725.2039270972.

The spelling of 381399783 in words is "three hundred eighty-one million, three hundred ninety-nine thousand, seven hundred eighty-three".