1868884769 has 2 divisors, whose sum is σ = 1868884770. Its totient is φ = 1868884768.

The previous prime is 1868884691. The next prime is 1868884793. The reversal of 1868884769 is 9674888681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1416769600 + 452115169 = 37640^2 + 21263^2 .

It is an emirp because it is prime and its reverse (9674888681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1868884769 - 2²⁴ = 1852107553 is a prime.

It is a super-2 number, since 2×1868884769² = 6985460559600366722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1868884469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 934442384 + 934442385.

It is an arithmetic number, because the mean of its divisors is an integer number (934442385).

Almost surely, 2^1868884769 is an apocalyptic number.

It is an amenable number.

1868884769 is a deficient number, since it is larger than the sum of its proper divisors (1).

1868884769 is an equidigital number, since it uses as much as digits as its factorization.

1868884769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37158912, while the sum is 65.

The square root of 1868884769 is about 43230.5999148751. The cubic root of 1868884769 is about 1231.7640031972.

The spelling of 1868884769 in words is "one billion, eight hundred sixty-eight million, eight hundred eighty-four thousand, seven hundred sixty-nine".