77777399983 has 2 divisors, whose sum is σ = 77777399984. Its totient is φ = 77777399982.

The previous prime is 77777399981. The next prime is 77777400079. The reversal of 77777399983 is 38999377777.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77777399983 - 2¹ = 77777399981 is a prime.

Together with 77777399981, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77777399981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38888699991 + 38888699992.

It is an arithmetic number, because the mean of its divisors is an integer number (38888699992).

Almost surely, 2^77777399983 is an apocalyptic number.

77777399983 is a deficient number, since it is larger than the sum of its proper divisors (1).

77777399983 is an equidigital number, since it uses as much as digits as its factorization.

77777399983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 882165816, while the sum is 76.

The spelling of 77777399983 in words is "seventy-seven billion, seven hundred seventy-seven million, three hundred ninety-nine thousand, nine hundred eighty-three".