1849798961 has 4 divisors (see below), whose sum is σ = 1850278500. Its totient is φ = 1849319424.

The previous prime is 1849798933. The next prime is 1849798981. The reversal of 1849798961 is 1698979481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1698979481 = 163 ⋅10423187.

It can be written as a sum of positive squares in 2 ways, for example, as 1158108961 + 691690000 = 34031^2 + 26300^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1849798961 is a prime.

It is a super-3 number, since 3×1849798961³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1849798894 and 1849798903.

It is not an unprimeable number, because it can be changed into a prime (1849798921) 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, 233936 + ... + 241713.

It is an arithmetic number, because the mean of its divisors is an integer number (462569625).

Almost surely, 2^1849798961 is an apocalyptic number.

It is an amenable number.

1849798961 is a deficient number, since it is larger than the sum of its proper divisors (479539).

1849798961 is an equidigital number, since it uses as much as digits as its factorization.

1849798961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479538.

The product of its digits is 7838208, while the sum is 62.

The square root of 1849798961 is about 43009.2892408140. The cubic root of 1849798961 is about 1227.5565568907.

The spelling of 1849798961 in words is "one billion, eight hundred forty-nine million, seven hundred ninety-eight thousand, nine hundred sixty-one".