77982911 has 2 divisors, whose sum is σ = 77982912. Its totient is φ = 77982910.

The previous prime is 77982901. The next prime is 77982913. The reversal of 77982911 is 11928977.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77982911 - 2⁶ = 77982847 is a prime.

Together with 77982913, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77982913) 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, 38991455 + 38991456.

It is an arithmetic number, because the mean of its divisors is an integer number (38991456).

Almost surely, 2^77982911 is an apocalyptic number.

77982911 is a deficient number, since it is larger than the sum of its proper divisors (1).

77982911 is an equidigital number, since it uses as much as digits as its factorization.

77982911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 44.

The square root of 77982911 is about 8830.7933392193. The cubic root of 77982911 is about 427.2346627009.

The spelling of 77982911 in words is "seventy-seven million, nine hundred eighty-two thousand, nine hundred eleven".