77555983 has 2 divisors, whose sum is σ = 77555984. Its totient is φ = 77555982.

The previous prime is 77555971. The next prime is 77555999. The reversal of 77555983 is 38955577.

It is a weak prime.

It is an emirp because it is prime and its reverse (38955577) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77555983 - 2¹⁷ = 77424911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77555903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38777991 + 38777992.

It is an arithmetic number, because the mean of its divisors is an integer number (38777992).

Almost surely, 2^77555983 is an apocalyptic number.

77555983 is a deficient number, since it is larger than the sum of its proper divisors (1).

77555983 is an equidigital number, since it uses as much as digits as its factorization.

77555983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1323000, while the sum is 49.

The square root of 77555983 is about 8806.5874775647. The cubic root of 77555983 is about 426.4535842621.

The spelling of 77555983 in words is "seventy-seven million, five hundred fifty-five thousand, nine hundred eighty-three".