1917536849 has 2 divisors, whose sum is σ = 1917536850. Its totient is φ = 1917536848.

The previous prime is 1917536827. The next prime is 1917536861. The reversal of 1917536849 is 9486357191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1059046849 + 858490000 = 32543^2 + 29300^2 .

It is an emirp because it is prime and its reverse (9486357191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1917536849 - 2¹² = 1917532753 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1917536849.

It is not a weakly prime, because it can be changed into another prime (1917536149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 958768424 + 958768425.

It is an arithmetic number, because the mean of its divisors is an integer number (958768425).

Almost surely, 2^1917536849 is an apocalyptic number.

It is an amenable number.

1917536849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1917536849 is an equidigital number, since it uses as much as digits as its factorization.

1917536849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 53.

The square root of 1917536849 is about 43789.6888433796. The cubic root of 1917536849 is about 1242.3612761251.

The spelling of 1917536849 in words is "one billion, nine hundred seventeen million, five hundred thirty-six thousand, eight hundred forty-nine".