381558799 has 4 divisors (see below), whose sum is σ = 398148336. Its totient is φ = 364969264.

The previous prime is 381558797. The next prime is 381558839. The reversal of 381558799 is 997855183.

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 381558799 - 2¹ = 381558797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381558791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8294734 + ... + 8294779.

It is an arithmetic number, because the mean of its divisors is an integer number (99537084).

Almost surely, 2^381558799 is an apocalyptic number.

381558799 is a deficient number, since it is larger than the sum of its proper divisors (16589537).

381558799 is a wasteful number, since it uses less digits than its factorization.

381558799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16589536.

The product of its digits is 2721600, while the sum is 55.

The square root of 381558799 is about 19533.5301213068. The cubic root of 381558799 is about 725.3046988770.

The spelling of 381558799 in words is "three hundred eighty-one million, five hundred fifty-eight thousand, seven hundred ninety-nine".