381037931209 has 4 divisors (see below), whose sum is σ = 410348541316. Its totient is φ = 351727321104.

The previous prime is 381037931189. The next prime is 381037931231. The reversal of 381037931209 is 902139730183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 902139730183 = 171757 ⋅5252419.

It can be written as a sum of positive squares in 2 ways, for example, as 263018199609 + 118019731600 = 512853^2 + 343540^2 .

It is a cyclic number.

It is not a de Polignac number, because 381037931209 - 2⁹ = 381037930697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381037931249) 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, 14655305034 + ... + 14655305059.

It is an arithmetic number, because the mean of its divisors is an integer number (102587135329).

Almost surely, 2^381037931209 is an apocalyptic number.

It is an amenable number.

381037931209 is a deficient number, since it is larger than the sum of its proper divisors (29310610107).

381037931209 is a wasteful number, since it uses less digits than its factorization.

381037931209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29310610106.

The product of its (nonzero) digits is 244944, while the sum is 46.

The spelling of 381037931209 in words is "three hundred eighty-one billion, thirty-seven million, nine hundred thirty-one thousand, two hundred nine".