77920327 has 2 divisors, whose sum is σ = 77920328. Its totient is φ = 77920326.

The previous prime is 77920291. The next prime is 77920331. The reversal of 77920327 is 72302977.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77920327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77920627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38960163 + 38960164.

It is an arithmetic number, because the mean of its divisors is an integer number (38960164).

Almost surely, 2^77920327 is an apocalyptic number.

77920327 is a deficient number, since it is larger than the sum of its proper divisors (1).

77920327 is an equidigital number, since it uses as much as digits as its factorization.

77920327 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37044, while the sum is 37.

The square root of 77920327 is about 8827.2491184967. The cubic root of 77920327 is about 427.1203418849.

The spelling of 77920327 in words is "seventy-seven million, nine hundred twenty thousand, three hundred twenty-seven".