77213027 has 2 divisors, whose sum is σ = 77213028. Its totient is φ = 77213026.

The previous prime is 77213021. The next prime is 77213029. The reversal of 77213027 is 72031277.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77213027 - 2¹⁶ = 77147491 is a prime.

Together with 77213029, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (77213021) 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, 38606513 + 38606514.

It is an arithmetic number, because the mean of its divisors is an integer number (38606514).

Almost surely, 2^77213027 is an apocalyptic number.

77213027 is a deficient number, since it is larger than the sum of its proper divisors (1).

77213027 is an equidigital number, since it uses as much as digits as its factorization.

77213027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4116, while the sum is 29.

The square root of 77213027 is about 8787.0943434107. The cubic root of 77213027 is about 425.8240565209.

The spelling of 77213027 in words is "seventy-seven million, two hundred thirteen thousand, twenty-seven".