1849311641 has 2 divisors, whose sum is σ = 1849311642. Its totient is φ = 1849311640.

The previous prime is 1849311637. The next prime is 1849311649. The reversal of 1849311641 is 1461139481.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1828417600 + 20894041 = 42760^2 + 4571^2 .

It is an emirp because it is prime and its reverse (1461139481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1849311641 - 2² = 1849311637 is a prime.

It is a super-2 number, since 2×1849311641² = 6839907091076225762, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1849311595 and 1849311604.

It is not a weakly prime, because it can be changed into another prime (1849311649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 924655820 + 924655821.

It is an arithmetic number, because the mean of its divisors is an integer number (924655821).

Almost surely, 2^1849311641 is an apocalyptic number.

It is an amenable number.

1849311641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1849311641 is an equidigital number, since it uses as much as digits as its factorization.

1849311641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 38.

The square root of 1849311641 is about 43003.6235798799. The cubic root of 1849311641 is about 1227.4487496076.

The spelling of 1849311641 in words is "one billion, eight hundred forty-nine million, three hundred eleven thousand, six hundred forty-one".