1649683471 has 2 divisors, whose sum is σ = 1649683472. Its totient is φ = 1649683470.

The previous prime is 1649683423. The next prime is 1649683489. The reversal of 1649683471 is 1743869461.

It is a strong prime.

It is an emirp because it is prime and its reverse (1743869461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1649683471 - 2⁹ = 1649682959 is a prime.

It is a super-3 number, since 3×1649683471³ (a number of 29 digits) contains 333 as substring.

It is a zygodrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1649681471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824841735 + 824841736.

It is an arithmetic number, because the mean of its divisors is an integer number (824841736).

Almost surely, 2^1649683471 is an apocalyptic number.

1649683471 is a deficient number, since it is larger than the sum of its proper divisors (1).

1649683471 is an equidigital number, since it uses as much as digits as its factorization.

1649683471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 49.

The square root of 1649683471 is about 40616.2956336493. The cubic root of 1649683471 is about 1181.5901837203.

The spelling of 1649683471 in words is "one billion, six hundred forty-nine million, six hundred eighty-three thousand, four hundred seventy-one".