1939118449 has 4 divisors (see below), whose sum is σ = 1939671460. Its totient is φ = 1938565440.

The previous prime is 1939118443. The next prime is 1939118471. The reversal of 1939118449 is 9448119391.

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 1215777424 + 723341025 = 34868^2 + 26895^2 .

It is a cyclic number.

It is not a de Polignac number, because 1939118449 - 2²¹ = 1937021297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1939118443) 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, 271212 + ... + 278269.

It is an arithmetic number, because the mean of its divisors is an integer number (484917865).

Almost surely, 2^1939118449 is an apocalyptic number.

It is an amenable number.

1939118449 is a deficient number, since it is larger than the sum of its proper divisors (553011).

1939118449 is an equidigital number, since it uses as much as digits as its factorization.

1939118449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553010.

The product of its digits is 279936, while the sum is 49.

The square root of 1939118449 is about 44035.4226617617. The cubic root of 1939118449 is about 1247.0047643701.

The spelling of 1939118449 in words is "one billion, nine hundred thirty-nine million, one hundred eighteen thousand, four hundred forty-nine".