1238841949 has 4 divisors (see below), whose sum is σ = 1238981436. Its totient is φ = 1238702464.

The previous prime is 1238841907. The next prime is 1238841959. The reversal of 1238841949 is 9491488321.

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 434722500 + 804119449 = 20850^2 + 28357^2 .

It is a cyclic number.

It is not a de Polignac number, because 1238841949 - 2¹⁷ = 1238710877 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1238841959) 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, 55444 + ... + 74509.

It is an arithmetic number, because the mean of its divisors is an integer number (309745359).

Almost surely, 2^1238841949 is an apocalyptic number.

It is an amenable number.

1238841949 is a deficient number, since it is larger than the sum of its proper divisors (139487).

1238841949 is an equidigital number, since it uses as much as digits as its factorization.

1238841949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139486.

The product of its digits is 497664, while the sum is 49.

The square root of 1238841949 is about 35197.1866631411. The cubic root of 1238841949 is about 1074.0025213585.

The spelling of 1238841949 in words is "one billion, two hundred thirty-eight million, eight hundred forty-one thousand, nine hundred forty-nine".