1938344105 has 4 divisors (see below), whose sum is σ = 2326012932. Its totient is φ = 1550675280.

The previous prime is 1938344101. The next prime is 1938344141. The reversal of 1938344105 is 5014438391.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1541975824 + 396368281 = 39268^2 + 19909^2 .

It is not a de Polignac number, because 1938344105 - 2² = 1938344101 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1938344101) 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, 193834406 + ... + 193834415.

It is an arithmetic number, because the mean of its divisors is an integer number (581503233).

Almost surely, 2^1938344105 is an apocalyptic number.

It is an amenable number.

1938344105 is a deficient number, since it is larger than the sum of its proper divisors (387668827).

1938344105 is an equidigital number, since it uses as much as digits as its factorization.

1938344105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387668826.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 1938344105 is about 44026.6294985206. The cubic root of 1938344105 is about 1246.8387543604.

The spelling of 1938344105 in words is "one billion, nine hundred thirty-eight million, three hundred forty-four thousand, one hundred five".