1938244949 has 4 divisors (see below), whose sum is σ = 1943644320. Its totient is φ = 1932845580.

The previous prime is 1938244939. The next prime is 1938244951. The reversal of 1938244949 is 9494428391.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1938244949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1938244949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1938244939) 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, 2699147 + ... + 2699864.

It is an arithmetic number, because the mean of its divisors is an integer number (485911080).

Almost surely, 2^1938244949 is an apocalyptic number.

It is an amenable number.

1938244949 is a deficient number, since it is larger than the sum of its proper divisors (5399371).

1938244949 is an equidigital number, since it uses as much as digits as its factorization.

1938244949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5399370.

The product of its digits is 2239488, while the sum is 53.

The square root of 1938244949 is about 44025.5033929199. The cubic root of 1938244949 is about 1246.8174933175.

The spelling of 1938244949 in words is "one billion, nine hundred thirty-eight million, two hundred forty-four thousand, nine hundred forty-nine".