1849311649 has 2 divisors, whose sum is σ = 1849311650. Its totient is φ = 1849311648.

The previous prime is 1849311641. The next prime is 1849311671. The reversal of 1849311649 is 9461139481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1097729424 + 751582225 = 33132^2 + 27415^2 .

It is a cyclic number.

It is not a de Polignac number, because 1849311649 - 2³ = 1849311641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1849311599 and 1849311608.

It is not a weakly prime, because it can be changed into another prime (1849311641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 924655824 + 924655825.

It is an arithmetic number, because the mean of its divisors is an integer number (924655825).

Almost surely, 2^1849311649 is an apocalyptic number.

It is an amenable number.

1849311649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1849311649 is an equidigital number, since it uses as much as digits as its factorization.

1849311649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 46.

The square root of 1849311649 is about 43003.6236728953. The cubic root of 1849311649 is about 1227.4487513775.

The spelling of 1849311649 in words is "one billion, eight hundred forty-nine million, three hundred eleven thousand, six hundred forty-nine".