1905474049 has 4 divisors (see below), whose sum is σ = 1907221680. Its totient is φ = 1903726420.

The previous prime is 1905474041. The next prime is 1905474059. The reversal of 1905474049 is 9404745091.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9404745091 = 7 ⋅1343535013.

It is a cyclic number.

It is not a de Polignac number, because 1905474049 - 2³ = 1905474041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1905473996 and 1905474014.

It is not an unprimeable number, because it can be changed into a prime (1905474041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 872179 + ... + 874360.

It is an arithmetic number, because the mean of its divisors is an integer number (476805420).

Almost surely, 2^1905474049 is an apocalyptic number.

It is an amenable number.

1905474049 is a deficient number, since it is larger than the sum of its proper divisors (1747631).

1905474049 is a wasteful number, since it uses less digits than its factorization.

1905474049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1747630.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 1905474049 is about 43651.7359219539. The cubic root of 1905474049 is about 1239.7506542080.

The spelling of 1905474049 in words is "one billion, nine hundred five million, four hundred seventy-four thousand, forty-nine".