381413831209 has 4 divisors (see below), whose sum is σ = 381428678916. Its totient is φ = 381398983504.

The previous prime is 381413831167. The next prime is 381413831237. The reversal of 381413831209 is 902138314183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 902138314183 = 134213 ⋅6721691.

It can be written as a sum of positive squares in 2 ways, for example, as 215043657984 + 166370173225 = 463728^2 + 407885^2 .

It is a cyclic number.

It is not a de Polignac number, because 381413831209 - 2⁹ = 381413830697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381413831809) 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, 7385254 + ... + 7436719.

It is an arithmetic number, because the mean of its divisors is an integer number (95357169729).

Almost surely, 2^381413831209 is an apocalyptic number.

It is an amenable number.

381413831209 is a deficient number, since it is larger than the sum of its proper divisors (14847707).

381413831209 is a wasteful number, since it uses less digits than its factorization.

381413831209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14847706.

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 381413831209 in words is "three hundred eighty-one billion, four hundred thirteen million, eight hundred thirty-one thousand, two hundred nine".