381188899 has 16 divisors (see below), whose sum is σ = 470292480. Its totient is φ = 300869280.

The previous prime is 381188881. The next prime is 381188903. The reversal of 381188899 is 998881183.

It is a cyclic number.

It is not a de Polignac number, because 381188899 - 2⁷ = 381188771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (381188809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34362 + ... + 44080.

It is an arithmetic number, because the mean of its divisors is an integer number (29393280).

Almost surely, 2^381188899 is an apocalyptic number.

381188899 is a deficient number, since it is larger than the sum of its proper divisors (89103581).

381188899 is a wasteful number, since it uses less digits than its factorization.

381188899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10170.

The product of its digits is 995328, while the sum is 55.

The square root of 381188899 is about 19524.0594907924. The cubic root of 381188899 is about 725.0702422629.

The spelling of 381188899 in words is "three hundred eighty-one million, one hundred eighty-eight thousand, eight hundred ninety-nine".