1969648871 has 2 divisors, whose sum is σ = 1969648872. Its totient is φ = 1969648870.

The previous prime is 1969648859. The next prime is 1969648903. The reversal of 1969648871 is 1788469691.

It is a weak prime.

It is an emirp because it is prime and its reverse (1788469691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1969648871 - 2²⁶ = 1902540007 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1969648871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1969648801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 984824435 + 984824436.

It is an arithmetic number, because the mean of its divisors is an integer number (984824436).

Almost surely, 2^1969648871 is an apocalyptic number.

1969648871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1969648871 is an equidigital number, since it uses as much as digits as its factorization.

1969648871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5225472, while the sum is 59.

The square root of 1969648871 is about 44380.7263460165. The cubic root of 1969648871 is about 1253.5151979205.

The spelling of 1969648871 in words is "one billion, nine hundred sixty-nine million, six hundred forty-eight thousand, eight hundred seventy-one".