381051952109 has 2 divisors, whose sum is σ = 381051952110. Its totient is φ = 381051952108.

The previous prime is 381051952067. The next prime is 381051952111. The reversal of 381051952109 is 901259150183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 380892637225 + 159314884 = 617165^2 + 12622^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381051952109 is a prime.

Together with 381051952111, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 381051952109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381051952199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190525976054 + 190525976055.

It is an arithmetic number, because the mean of its divisors is an integer number (190525976055).

Almost surely, 2^381051952109 is an apocalyptic number.

It is an amenable number.

381051952109 is a deficient number, since it is larger than the sum of its proper divisors (1).

381051952109 is an equidigital number, since it uses as much as digits as its factorization.

381051952109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 44.

The spelling of 381051952109 in words is "three hundred eighty-one billion, fifty-one million, nine hundred fifty-two thousand, one hundred nine".