1849020749 has 4 divisors (see below), whose sum is σ = 1888361664. Its totient is φ = 1809679836.

The previous prime is 1849020731. The next prime is 1849020763. The reversal of 1849020749 is 9470209481.

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: 9470209481 = 73 ⋅129728897.

It is a cyclic number.

It is not a de Polignac number, because 1849020749 - 2²⁴ = 1832243533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1849020709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19670387 + ... + 19670480.

It is an arithmetic number, because the mean of its divisors is an integer number (472090416).

Almost surely, 2^1849020749 is an apocalyptic number.

It is an amenable number.

1849020749 is a deficient number, since it is larger than the sum of its proper divisors (39340915).

1849020749 is an equidigital number, since it uses as much as digits as its factorization.

1849020749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39340914.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 1849020749 is about 43000.2412667650. The cubic root of 1849020749 is about 1227.3843880479.

The spelling of 1849020749 in words is "one billion, eight hundred forty-nine million, twenty thousand, seven hundred forty-nine".