381391699 has 8 divisors (see below), whose sum is σ = 419469120. Its totient is φ = 344562816.

The previous prime is 381391691. The next prime is 381391709. The reversal of 381391699 is 996193183.

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

It is not a de Polignac number, because 381391699 - 2³ = 381391691 is a prime.

It is a super-2 number, since 2×381391699² = 290919256132213202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381391691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 311494 + ... + 312715.

It is an arithmetic number, because the mean of its divisors is an integer number (52433640).

Almost surely, 2^381391699 is an apocalyptic number.

381391699 is a deficient number, since it is larger than the sum of its proper divisors (38077421).

381391699 is a wasteful number, since it uses less digits than its factorization.

381391699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624269.

The product of its digits is 314928, while the sum is 49.

The square root of 381391699 is about 19529.2523922448. The cubic root of 381391699 is about 725.1988033485.

The spelling of 381391699 in words is "three hundred eighty-one million, three hundred ninety-one thousand, six hundred ninety-nine".